diff --git a/app/messages/assignment_unmuted.email.erb b/app/messages/assignment_unmuted.email.erb
deleted file mode 100644
index 5e9b98c3e46..00000000000
--- a/app/messages/assignment_unmuted.email.erb
+++ /dev/null
@@ -1,15 +0,0 @@
-<% define_content :link do %>
-  <%= polymorphic_url([asset.context, asset]) %>
-<% end %>
-
-<% define_content :subject do %>
-  <%= t :subject, "Assignment Unmuted: %{title}, %{course}", :title => asset.title, :course => asset.context.name %>
-<% end %>
-
-<%= t :body, <<-BODY, :title => asset.title, :course => asset.context.name, :url => content(:link)
-Your instructor has released grade changes and new comments for %{title}. These changes are now viewable.
-
-You can view it here:
-%{url}
-BODY
-%>
diff --git a/app/messages/assignment_unmuted.email.html.erb b/app/messages/assignment_unmuted.email.html.erb
deleted file mode 100644
index eb00a1ad303..00000000000
--- a/app/messages/assignment_unmuted.email.html.erb
+++ /dev/null
@@ -1,15 +0,0 @@
-<% define_content :link do %>
-  <%= polymorphic_url([asset.context, asset]) %>
-<% end %>
-
-<% define_content :subject do %>
-  <%= t :subject, "Assignment Unmuted: %{title}, %{course}", :title => asset.title, :course => asset.context.name %>
-<% end %>
-
-<% define_content :footer_link do %>
-  <a href="<%= content(:link) %>">
-    <%= t :link, "You can view it here" %>
-  </a>
-<% end %>
-
-<p><%= t :body, "Your instructor has released grade changes and new comments for %{title}. These changes are now viewable.", :title => asset.title %></p>
diff --git a/app/messages/assignment_unmuted.sms.erb b/app/messages/assignment_unmuted.sms.erb
deleted file mode 100644
index b7e529fb5e7..00000000000
--- a/app/messages/assignment_unmuted.sms.erb
+++ /dev/null
@@ -1,6 +0,0 @@
-<%= t :body, <<-BODY, :title => asset.title, :course => asset.context.name, :website => HostUrl.context_host(asset.context)
-Your instructor has released grades and comments for %{title}, %{course}.
-
-More info at %{website}
-BODY
-%>
diff --git a/app/messages/assignment_unmuted.summary.erb b/app/messages/assignment_unmuted.summary.erb
deleted file mode 100644
index 1c4c874fd84..00000000000
--- a/app/messages/assignment_unmuted.summary.erb
+++ /dev/null
@@ -1,7 +0,0 @@
-<% define_content :link do %>
-  <%= polymorphic_url([asset.context, asset]) %>
-<% end %>
-
-<% define_content :subject do %>
-  <%= t :subject, "Grades and comments released for: %{title}, %{course}", :title => asset.title, :course => asset.context.name %>
-<% end %>
diff --git a/app/messages/notification_types.yml b/app/messages/notification_types.yml
index d815606e701..14d0c3580f8 100644
--- a/app/messages/notification_types.yml
+++ b/app/messages/notification_types.yml
@@ -126,8 +126,6 @@
   notifications:
     - name: Assignment Graded
       delay_for: <%= 15*60 %>
-    - name: Assignment Unmuted
-      delay_for: 0
     - name: Submission Graded
       delay_for: <%= 60*60 %>
     - name: Submission Grade Changed
diff --git a/app/models/assignment.rb b/app/models/assignment.rb
index 1bfc94b4c5b..da99859bc6e 100644
--- a/app/models/assignment.rb
+++ b/app/models/assignment.rb
@@ -1123,16 +1123,6 @@ class Assignment < ActiveRecord::Base
       assignment.overridden_for(user, skip_clone: true)
     }
 
-    p.dispatch :assignment_unmuted
-    p.to { |assignment|
-      BroadcastPolicies::AssignmentParticipants.new(assignment).to
-    }
-    p.whenever { |assignment|
-      BroadcastPolicies::AssignmentPolicy.new(assignment).
-        should_dispatch_assignment_unmuted?
-    }
-    p.data { course_broadcast_data }
-
     p.dispatch :submissions_posted
     p.to { |assignment|
       assignment.course.participating_instructors
@@ -3391,7 +3381,6 @@ class Assignment < ActiveRecord::Base
 
       previously_unposted_submissions.each do |submission|
         submission.grade_posting_in_progress = true
-        # Need to broadcast assignment_unmuted here.
         submission.broadcast_notifications
         submission.grade_posting_in_progress = false
       end
diff --git a/app/models/broadcast_policies/assignment_policy.rb b/app/models/broadcast_policies/assignment_policy.rb
index 7f3ffa7b710..38f906d3e24 100644
--- a/app/models/broadcast_policies/assignment_policy.rb
+++ b/app/models/broadcast_policies/assignment_policy.rb
@@ -48,13 +48,6 @@ module BroadcastPolicies
         (assignment.saved_change_to_workflow_state? && assignment.published?)
     end
 
-    def should_dispatch_assignment_unmuted?
-      # This is handled by individual submissions in the Post Policies era.
-      return false if assignment.context.post_policies_enabled?
-      context_sendable? &&
-        assignment.recently_unmuted
-    end
-
     def should_dispatch_submissions_posted?
       return false unless assignment.context.post_policies_enabled?
       context_sendable? && assignment.posting_params_for_notifications.present?
diff --git a/app/models/broadcast_policies/submission_policy.rb b/app/models/broadcast_policies/submission_policy.rb
index a41d53d1a0a..c256192b6a3 100644
--- a/app/models/broadcast_policies/submission_policy.rb
+++ b/app/models/broadcast_policies/submission_policy.rb
@@ -73,8 +73,6 @@ module BroadcastPolicies
     end
 
     def should_dispatch_submission_posted?
-      # When Post Policies aren't enabled, the assignment handles notifications
-      # via the Assignment Unmuted notification.
       return false unless assignment.course.post_policies_enabled? &&
         submission.grade_posting_in_progress &&
         context_sendable?
diff --git a/app/models/notification.rb b/app/models/notification.rb
index 80bfd3ce6ae..55cd4d91fdb 100644
--- a/app/models/notification.rb
+++ b/app/models/notification.rb
@@ -487,7 +487,6 @@ EOS
 Includes:
 
 * Assignment/submission grade entered/changed
-* Un-muted assignment grade
 * Grade weight changed
 EOS
     when 'Late Grading'
diff --git a/lib/mutable.rb b/lib/mutable.rb
index e2c0fcdb429..0f6efec89fd 100644
--- a/lib/mutable.rb
+++ b/lib/mutable.rb
@@ -16,26 +16,6 @@
 # with this program. If not, see <http://www.gnu.org/licenses/>.
 
 module Mutable
-
-  attr_accessor :recently_unmuted
-
-  def self.included(base)
-    base.extend(ClassMethods)
-  end
-
-  module ClassMethods
-    def declare_mutable_broadcast_policy(options)
-      policy       = options[:policy]
-      participants = options[:participants]
-
-      policy.dispatch :assignment_unmuted
-      policy.to { participants }
-      policy.whenever do |record|
-        @recently_unmuted
-      end
-    end
-  end
-
   def mute!
     return if muted?
     self.update_attribute(:muted, true)
@@ -48,18 +28,11 @@ module Mutable
   def unmute!
     return unless muted?
     self.update_attribute(:muted, false)
-    broadcast_unmute_event
     post_submissions if respond_to?(:post_submissions)
     ensure_post_policy(post_manually: false) if respond_to?(:ensure_post_policy)
     true
   end
 
-  def broadcast_unmute_event
-    @recently_unmuted = true
-    self.save!
-    @recently_unmuted = false
-  end
-
   protected
   def clear_sent_messages
     self.clear_broadcast_messages if self.respond_to? :clear_broadcast_messages
diff --git a/spec/lib/mutable_spec.rb b/spec/lib/mutable_spec.rb
index f91d74b5848..33c33274aad 100644
--- a/spec/lib/mutable_spec.rb
+++ b/spec/lib/mutable_spec.rb
@@ -60,17 +60,5 @@ describe Mutable do
       expect(@mutable).to receive(:update_attribute).never
       @mutable.unmute!
     end
-
-    it "broadcasts unmute event if currently muted" do
-      expect(@mutable).to receive(:muted?).and_return(true)
-      expect(@mutable).to receive(:broadcast_unmute_event).once
-      @mutable.unmute!
-    end
-
-    it "skips unmute event if not muted" do
-      expect(@mutable).to receive(:muted?).and_return(false)
-      expect(@mutable).to receive(:broadcast_unmute_event).never
-      @mutable.unmute!
-    end
   end
 end
diff --git a/spec/models/assignment_spec.rb b/spec/models/assignment_spec.rb
index e4bfd7123ba..c16813cdd10 100644
--- a/spec/models/assignment_spec.rb
+++ b/spec/models/assignment_spec.rb
@@ -5107,43 +5107,6 @@ describe Assignment do
       end
     end
 
-    context "assignment unmuted" do
-      let(:assignment) { @course.assignments.create! }
-
-      before :once do
-        @assignment_unmuted_notification = Notification.create(name: "Assignment Unmuted")
-        @student.update!(email: "fakeemail@example.com")
-        @student.email_channel.update!(workflow_state: :active)
-      end
-
-      it "should create a message when an assignment is unmuted" do
-        assignment.mute!
-
-        expect {
-          assignment.unmute!
-        }.to change {
-          DelayedMessage.where(
-            communication_channel: @student.email_channel,
-            notification: @assignment_unmuted_notification
-          ).count
-        }.by(1)
-      end
-
-      it "should not create a message in an unpublished course" do
-        @course.update!(workflow_state: "created")
-        assignment.mute!
-
-        expect {
-          assignment.unmute!
-        }.not_to change {
-          DelayedMessage.where(
-            communication_channel: @student.email_channel,
-            notification: @assignment_unmuted_notification
-          ).count
-        }
-      end
-    end
-
     context "varied due date notifications" do
       before :once do
         @teacher.communication_channels.create(:path => "teacher@instructure.com").confirm!
diff --git a/spec/models/broadcast_policies/assignment_policy_spec.rb b/spec/models/broadcast_policies/assignment_policy_spec.rb
index 07683adde6c..789358b9f1b 100644
--- a/spec/models/broadcast_policies/assignment_policy_spec.rb
+++ b/spec/models/broadcast_policies/assignment_policy_spec.rb
@@ -117,30 +117,6 @@ module BroadcastPolicies
       specify { wont_send_when { allow(assignment).to receive(:saved_change_to_points_possible?).and_return false } }
     end
 
-    describe '#should_dispatch_assignment_unmuted?' do
-      before do
-        allow(assignment).to receive(:recently_unmuted).and_return true
-      end
-
-      it 'is true when the dependent inputs are true' do
-        expect(policy.should_dispatch_assignment_unmuted?).to be_truthy
-      end
-
-      it "returns false when post policies are enabled" do
-        allow(context).to receive(:post_policies_enabled?).and_return true
-        expect(policy.should_dispatch_assignment_unmuted?).to be false
-      end
-
-      def wont_send_when
-        yield
-        expect(policy.should_dispatch_assignment_unmuted?).to be_falsey
-      end
-
-      specify { wont_send_when { allow(context).to receive(:available?).and_return false } }
-      specify { wont_send_when { allow(assignment).to receive(:recently_unmuted).and_return false } }
-
-    end
-
     describe "#should_dispatch_submissions_posted" do
       let(:posting_params) { { graded_only: false } }