Remove some deprecated code

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/finders/issuable_finder.rb

@@ -43,7 +43,7 @@ class IssuableFinder
   FILTER_NONE = 'none'.freeze
   FILTER_ANY = 'any'.freeze
-  # This is accepted as a deprecated filter and is also used in unassigning users
+  # This is used in unassigning users
   NONE = '0'.freeze
   attr_accessor :current_user, :params
@@ -248,8 +248,7 @@ class IssuableFinder
   def filter_by_no_label?
     downcased = label_names.map(&:downcase)
-    # Label::NONE is deprecated and should be removed in 12.0
-    downcased.include?(FILTER_NONE) || downcased.include?(Label::NONE)
+    downcased.include?(FILTER_NONE)
   end
   def filter_by_any_label?
@@ -449,8 +448,7 @@ class IssuableFinder
   # rubocop: enable CodeReuse/ActiveRecord
   def filter_by_no_assignee?
-    # Assignee_id takes precedence over assignee_username
-    [NONE, FILTER_NONE].include?(params[:assignee_id].to_s.downcase) || params[:assignee_username].to_s == NONE
+    params[:assignee_id].to_s.downcase == FILTER_NONE
   end
   def filter_by_any_assignee?

app/models/broadcast_message.rb

@@ -17,13 +17,11 @@ class BroadcastMessage < ApplicationRecord
   default_value_for :font,  '#FFFFFF'
   CACHE_KEY = 'broadcast_message_current_json'.freeze
-  LEGACY_CACHE_KEY = 'broadcast_message_current'.freeze
   after_commit :flush_redis_cache
   def self.current
     messages = cache.fetch(CACHE_KEY, as: BroadcastMessage, expires_in: cache_expires_in) do
-      remove_legacy_cache_key
       current_and_future_messages
     end
@@ -50,14 +48,6 @@ class BroadcastMessage < ApplicationRecord
     nil
   end
-  # This can be removed in GitLab 12.0+
-  # The old cache key had an indefinite lifetime, and in an HA
-  # environment a one-shot migration would not work because the cache
-  # would be repopulated by a node that has not been upgraded.
-  def self.remove_legacy_cache_key
-    cache.expire(LEGACY_CACHE_KEY)
-  end
-
   def active?
     started? && !ended?
   end
@@ -84,6 +74,5 @@ class BroadcastMessage < ApplicationRecord
   def flush_redis_cache
     self.class.cache.expire(CACHE_KEY)
-    self.class.remove_legacy_cache_key
   end
 end

app/models/label.rb

@@ -13,7 +13,6 @@ class Label < ApplicationRecord
   cache_markdown_field :description, pipeline: :single_line
   DEFAULT_COLOR = '#428BCA'
-  NONE = 'no label'
   default_value_for :color, DEFAULT_COLOR

spec/features/issues_spec.rb

@@ -208,7 +208,7 @@ describe 'Issues' do
       let(:issue) { @issue }
       it 'allows filtering by issues with no specified assignee' do
-        visit project_issues_path(project, assignee_id: IssuableFinder::NONE)
+        visit project_issues_path(project, assignee_id: IssuableFinder::FILTER_NONE)
         expect(page).to have_content 'foobar'
         expect(page).not_to have_content 'barbaz'

spec/features/merge_requests/user_lists_merge_requests_spec.rb

@@ -33,7 +33,7 @@ describe 'Merge requests > User lists merge requests' do
   end
   it 'filters on no assignee' do
-    visit_merge_requests(project, assignee_id: IssuableFinder::NONE)
+    visit_merge_requests(project, assignee_id: IssuableFinder::FILTER_NONE)
     expect(current_path).to eq(project_merge_requests_path(project))
     expect(page).to have_content 'merge-test'

spec/finders/issues_finder_spec.rb

@@ -241,14 +241,6 @@ describe IssuesFinder do
         end
       end
-      context 'filtering by legacy No+Label' do
-        let(:params) { { label_name: Label::NONE } }
-
-        it 'returns issues with no labels' do
-          expect(issues).to contain_exactly(issue1, issue3, issue4)
-        end
-      end
-
       context 'filtering by any label' do
         let(:params) { { label_name: described_class::FILTER_ANY } }

spec/models/broadcast_message_spec.rb

@@ -88,13 +88,6 @@ describe BroadcastMessage do
       expect(Rails.cache).not_to receive(:delete).with(described_class::CACHE_KEY)
       expect(described_class.current.length).to eq(0)
     end
-
-    it 'clears the legacy cache key' do
-      create(:broadcast_message, :future)
-
-      expect(Rails.cache).to receive(:delete).with(described_class::LEGACY_CACHE_KEY)
-      expect(described_class.current.length).to eq(0)
-    end
   end
   describe '#attributes' do
@@ -164,7 +157,6 @@ describe BroadcastMessage do
       message = create(:broadcast_message)
       expect(Rails.cache).to receive(:delete).with(described_class::CACHE_KEY)
-      expect(Rails.cache).to receive(:delete).with(described_class::LEGACY_CACHE_KEY)
       message.flush_redis_cache
     end

spec/requests/api/issues/issues_spec.rb

@@ -273,14 +273,6 @@ describe API::Issues do
         expect_paginated_array_response(issue2.id)
       end
-      it 'returns issues with no assignee' do
-        issue2 = create(:issue, author: user2, project: project)
-
-        get api('/issues', user), params: { assignee_id: 0, scope: 'all' }
-
-        expect_paginated_array_response(issue2.id)
-      end
-
       it 'returns issues with no assignee' do
         issue2 = create(:issue, author: user2, project: project)
@@ -496,18 +488,6 @@ describe API::Issues do
           expect_paginated_array_response(closed_issue.id)
         end
-
-        it 'returns an array of issues with no label when using the legacy No+Label filter' do
-          get api('/issues', user), params: { labels: 'No Label' }
-
-          expect_paginated_array_response(closed_issue.id)
-        end
-
-        it 'returns an array of issues with no label when using the legacy No+Label filter with labels param as array' do
-          get api('/issues', user), params: { labels: ['No Label'] }
-
-          expect_paginated_array_response(closed_issue.id)
-        end
       end
       it 'returns an empty array if no issue matches milestone' do

spec/support/shared_examples/finders/assignees_filter_shared_examples.rb

@@ -19,12 +19,6 @@ shared_examples 'no assignee filter' do
     expect(issuables).to contain_exactly(*expected_issuables)
   end
-  it 'returns issuables not assigned to any assignee' do
-    params[:assignee_id] = 0
-
-    expect(issuables).to contain_exactly(*expected_issuables)
-  end
-
   it 'returns issuables not assigned to any assignee' do
     params[:assignee_id] = 'none'