stop logging stats in adheres_to_policy

refs CORE-2538

test plan
 - specs should pass

Change-Id: I09ffd6982be803294b7d70c1e485d999a01352ea
Reviewed-on: https://gerrit.instructure.com/186260
Tested-by: Jenkins
Reviewed-by: Cody Cutrer <cody@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>

gems/adheres_to_policy/adheres_to_policy.gemspec

@@ -15,7 +15,6 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_dependency 'rails', ">= 3.2"
-  spec.add_dependency 'canvas_statsd', "~> 2.0"
 
   spec.add_development_dependency "bundler", "~> 1.5"
   spec.add_development_dependency "rake"

gems/adheres_to_policy/lib/adheres_to_policy/cache.rb

@@ -42,9 +42,9 @@ module AdheresToPolicy
       if value.nil?
         if block_given?
           how_it_got_it = :generated
-          elapsed = Benchmark.realtime do
+          start_time = Time.now
           value = yield
-          end
+          elapsed = Time.now - start_time
           Thread.current[:last_cache_generate] = elapsed # so we can record it in the logs
           self.write(key, value, use_rails_cache: use_rails_cache)
         end

gems/adheres_to_policy/lib/adheres_to_policy/instance_methods.rb

@@ -16,8 +16,6 @@
 # with this program. If not, see <http://www.gnu.org/licenses/>.
 #
 
-require 'canvas_statsd'
-
 module AdheresToPolicy
   module InstanceMethods
     # Public: Gets the requested rights granted to a user.
@@ -244,7 +242,6 @@ module AdheresToPolicy
         permission_cache_key_for(user, session, sought_right),
         use_rails_cache: use_rails_cache
       ) do
-        CanvasStatsd::BlockTracking.track("adheres_to_policy.#{sought_right_cookie}", category: :adheres_to_policy) do
 
         conditions = self.class.policy.conditions[sought_right]
         next false unless conditions
@@ -253,9 +250,9 @@ module AdheresToPolicy
         # grants us the sought_right.
         conditions.any? do |condition|
           condition_applies = false
-            elapsed_time = Benchmark.realtime do
+          start_time = Time.now
           condition_applies = condition.applies?(self, user, session)
-            end
+          elapsed_time = Time.now - start_time
 
           if condition_applies
             # Since the condition is true we can loop through all the rights
@@ -281,8 +278,6 @@ module AdheresToPolicy
           end
         end
       end
-      end
-      CanvasStatsd::Statsd.instance&.increment("adheres_to_policy.#{sought_right_cookie}.#{how_it_got_it}")
 
       value
     ensure