Remove the deployment_filters feature flag

This feature is deemed stable and ready to be released.

See https://gitlab.com/gitlab-org/gitlab/-/issues/267561 for more
information.

app/assets/javascripts/filtered_search/add_extra_tokens_for_merge_requests.js

@@ -96,7 +96,6 @@ export default (IssuableTokenKeys, disableTargetBranchFilter = false) => {
   IssuableTokenKeys.tokenKeysWithAlternative.splice(tokenPosition, 0, ...[approvedBy.token]);
   IssuableTokenKeys.conditions.push(...approvedBy.condition);
 
-  if (gon?.features?.deploymentFilters) {
   const environmentToken = {
     formattedKey: __('Environment'),
     key: 'environment',
@@ -134,5 +133,4 @@ export default (IssuableTokenKeys, disableTargetBranchFilter = false) => {
     deployedBeforeToken,
     deployedAfterToken,
   );
-  }
 };

app/controllers/groups_controller.rb

@@ -30,7 +30,6 @@ class GroupsController < Groups::ApplicationController
 
   before_action do
     push_frontend_feature_flag(:vue_issuables_list, @group)
-    push_frontend_feature_flag(:deployment_filters)
   end
 
   before_action do
@@ -181,8 +180,6 @@ class GroupsController < Groups::ApplicationController
   end
 
   def unfoldered_environment_names
-    return render_404 unless Feature.enabled?(:deployment_filters)
-
     respond_to do |format|
       format.json do
         render json: EnvironmentNamesFinder.new(@group, current_user).execute

app/controllers/projects/merge_requests_controller.rb

@@ -48,7 +48,6 @@ class Projects::MergeRequestsController < Projects::MergeRequests::ApplicationCo
 
   before_action do
     push_frontend_feature_flag(:vue_issuable_sidebar, @project.group)
-    push_frontend_feature_flag(:deployment_filters)
   end
 
   around_action :allow_gitaly_ref_name_caching, only: [:index, :show, :discussions]

app/controllers/projects_controller.rb

@@ -317,8 +317,6 @@ class ProjectsController < Projects::ApplicationController
   end
 
   def unfoldered_environment_names
-    return render_404 unless Feature.enabled?(:deployment_filters)
-
     respond_to do |format|
       format.json do
         render json: EnvironmentNamesFinder.new(@project, current_user).execute

app/finders/merge_requests_finder.rb

@@ -155,19 +155,6 @@ class MergeRequestsFinder < IssuableFinder
       .or(table[:title].matches('(Draft)%'))
   end
 
-  # rubocop: disable CodeReuse/ActiveRecord
-  def by_deployment(items)
-    return items unless deployment_id
-
-    items.includes(:deployment_merge_requests)
-         .where(deployment_merge_requests: { deployment_id: deployment_id })
-  end
-  # rubocop: enable CodeReuse/ActiveRecord
-
-  def deployment_id
-    @deployment_id ||= params[:deployment_id].presence
-  end
-
   # Filter by merge requests that had been approved by specific users
   # rubocop: disable CodeReuse/Finder
   def by_approvals(items)
@@ -178,10 +165,6 @@ class MergeRequestsFinder < IssuableFinder
   # rubocop: enable CodeReuse/Finder
 
   def by_deployments(items)
-    # Until this feature flag is enabled permanently, we retain the old
-    # filtering behaviour/code.
-    return by_deployment(items) unless Feature.enabled?(:deployment_filters)
-
     env = params[:environment]
     before = params[:deployed_before]
     after = params[:deployed_after]

changelogs/unreleased/enable-deployments-filters.yml

+---
+title: Add merge requests filters for filtering by environments and deployment dates
+merge_request: 46683
+author:
+type: added

config/feature_flags/development/deployment_filters.yml

----
-name: deployment_filters
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/44041
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/267561
-type: development
-group: group::source code
-default_enabled: false