Remove the feature flag :emails_disabled

as it's no longer needed

app/helpers/groups_helper.rb

@@ -32,7 +32,6 @@ module GroupsHelper
   end
 
   def can_disable_group_emails?(group)
-    Feature.enabled?(:emails_disabled, group, default_enabled: true) &&
     can?(current_user, :set_emails_disabled, group) && !group.parent&.emails_disabled?
   end
 

app/helpers/projects_helper.rb

@@ -160,7 +160,7 @@ module ProjectsHelper
   def can_disable_emails?(project, current_user)
     return false if project.group&.emails_disabled?
 
-    can?(current_user, :set_emails_disabled, project) && Feature.enabled?(:emails_disabled, project, default_enabled: true)
+    can?(current_user, :set_emails_disabled, project)
   end
 
   def last_push_event

app/models/namespace.rb

@@ -182,7 +182,7 @@ class Namespace < ApplicationRecord
   # any ancestor can disable emails for all descendants
   def emails_disabled?
     strong_memoize(:emails_disabled) do
-      Feature.enabled?(:emails_disabled, self, default_enabled: true) && self_and_ancestors.where(emails_disabled: true).exists?
+      self_and_ancestors.where(emails_disabled: true).exists?
     end
   end
 

app/models/project.rb

@@ -664,7 +664,7 @@ class Project < ApplicationRecord
   def emails_disabled?
     strong_memoize(:emails_disabled) do
       # disabling in the namespace overrides the project setting
-      Feature.enabled?(:emails_disabled, self, default_enabled: true) && (super || namespace.emails_disabled?)
+      super || namespace.emails_disabled?
     end
   end
 

spec/models/namespace_spec.rb

@@ -896,32 +896,6 @@ describe Namespace do
         end
       end
     end
-
-    context 'when :emails_disabled feature flag is off' do
-      before do
-        stub_feature_flags(emails_disabled: false)
-      end
-
-      context 'when not a subgroup' do
-        it 'returns false' do
-          group = create(:group, emails_disabled: true)
-
-          expect(group.emails_disabled?).to be_falsey
-        end
-      end
-
-      context 'when a subgroup and ancestor emails are disabled' do
-        let(:grandparent) { create(:group) }
-        let(:parent)      { create(:group, parent: grandparent) }
-        let(:group)       { create(:group, parent: parent) }
-
-        it 'returns false' do
-          grandparent.update_attribute(:emails_disabled, true)
-
-          expect(group.emails_disabled?).to be_falsey
-        end
-      end
-    end
   end
 
   describe '#pages_virtual_domain' do

spec/models/project_spec.rb

@@ -2387,29 +2387,6 @@ describe Project do
         expect(project.emails_disabled?).to be_truthy
       end
     end
-
-    context 'when :emails_disabled feature flag is off' do
-      before do
-        stub_feature_flags(emails_disabled: false)
-      end
-
-      context 'emails disabled in group' do
-        it 'returns false' do
-          allow(project.namespace).to receive(:emails_disabled?) { true }
-
-          expect(project.emails_disabled?).to be_falsey
-        end
-      end
-
-      context 'emails enabled in group' do
-        it 'returns false' do
-          allow(project.namespace).to receive(:emails_disabled?) { false }
-          project.update_attribute(:emails_disabled, true)
-
-          expect(project.emails_disabled?).to be_falsey
-        end
-      end
-    end
   end
 
   describe '#lfs_enabled?' do