Remove clear_status_with_quick_options FF

This change removes the clear_status_with_quick_options.

config/feature_flags/development/clear_status_with_quick_options.yml

----
-name: clear_status_with_quick_options
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/53620
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/320777
-milestone: '13.9'
-type: development
-group: group::optimize
-default_enabled: true

lib/api/users.rb

@@ -1071,10 +1071,7 @@ module API
       put "status", feature_category: :users do
         forbidden! unless can?(current_user, :update_user_status, current_user)
 
-        update_params = declared_params
-        update_params.delete(:clear_status_after) if Feature.disabled?(:clear_status_with_quick_options, current_user, default_enabled: :yaml)
-
-        if ::Users::SetStatusService.new(current_user, update_params).execute
+        if ::Users::SetStatusService.new(current_user, declared_params).execute
           present current_user.status, with: Entities::UserStatus
         else
           render_validation_error!(current_user.status)

spec/requests/api/users_spec.rb

@@ -3044,18 +3044,6 @@ RSpec.describe API::Users do
 
         expect(response).to have_gitlab_http_status(:bad_request)
       end
-
-      context 'when the clear_status_with_quick_options feature flag is disabled' do
-        before do
-          stub_feature_flags(clear_status_with_quick_options: false)
-        end
-
-        it 'does not persist clear_status_at' do
-          put api('/user/status', user), params: { emoji: 'smirk', message: 'hello world', clear_status_after: '3_hours' }
-
-          expect(user.status.reload.clear_status_at).to be_nil
-        end
-      end
     end
   end