iconv isn't actually used anymore

Change-Id: I71f96b565c7004e80e6852c62056eb06c08f6463
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/251674
Tested-by: Service Cloud Jenkins <svc.cloudjenkins@instructure.com>
Reviewed-by: Ethan Vizitei <evizitei@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>

app/models/error_report.rb

@@ -18,8 +18,6 @@
 # with this program. If not, see <http://www.gnu.org/licenses/>.
 #
 
-require 'iconv'
-
 class ErrorReport < ActiveRecord::Base
   belongs_to :user
   belongs_to :account

gems/html_text_helper/html_text_helper.gemspec

@@ -17,7 +17,6 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'nokogiri'
   spec.add_dependency 'sanitize', '~> 2.1.0'
   spec.add_dependency 'canvas_text_helper'
-  spec.add_dependency 'iconv', '~> 1.0'
 
   spec.add_dependency 'activesupport', ">= 3.2"
 

gems/html_text_helper/lib/html_text_helper.rb

@@ -33,7 +33,6 @@
 
 require 'nokogiri'
 require 'cgi'
-require 'iconv'
 require 'active_support/core_ext/module/remove_method' # https://github.com/rails/rails/issues/28918
 require 'active_support'
 require 'active_support/core_ext'

gems/incoming_mail_processor/lib/incoming_mail_processor/incoming_message_processor.rb

@@ -18,7 +18,6 @@
 # with this program. If not, see <http://www.gnu.org/licenses/>.
 #
 
-require 'iconv'
 require 'mail'
 
 module IncomingMailProcessor

gems/utf8_cleaner/utf8_cleaner.gemspec

@@ -14,8 +14,6 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
-  spec.add_dependency 'iconv', '~> 1.0'
-
   spec.add_development_dependency "bundler", "~> 1.5"
   spec.add_development_dependency "rake"
   spec.add_development_dependency "rspec", "~> 3.5.0"