Merge branch 'mw-remove-import_project_from_remote_file-ff' into 'master'

Remove import_project_from_remote_file feature flag

See merge request gitlab-org/gitlab!84266

config/feature_flags/development/import_project_from_remote_file.yml

----
-name: import_project_from_remote_file
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/59033
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/330039
-milestone: '13.12'
-type: development
-group: group::import
-default_enabled: true

lib/api/project_import.rb

@@ -135,8 +135,6 @@ module API
         success Entities::ProjectImportStatus
       end
       post 'remote-import' do
-        not_found! unless ::Feature.enabled?(:import_project_from_remote_file, default_enabled: :yaml)
-
         check_rate_limit! :project_import, scope: [current_user, :project_import]
 
         response = ::Import::GitlabProjects::CreateProjectService.new(

spec/requests/api/project_import_spec.rb

@@ -306,19 +306,6 @@ RSpec.describe API::ProjectImport, :aggregate_failures do
 
     it_behaves_like 'requires authentication'
 
-    it 'returns NOT FOUND when the feature is disabled' do
-      stub_feature_flags(import_project_from_remote_file: false)
-
-      subject
-
-      expect(response).to have_gitlab_http_status(:not_found)
-    end
-
-    context 'when the feature flag is enabled' do
-      before do
-        stub_feature_flags(import_project_from_remote_file: true)
-      end
-
     context 'when the response is successful' do
       it 'schedules the import successfully' do
         project = create(
@@ -365,7 +352,6 @@ RSpec.describe API::ProjectImport, :aggregate_failures do
       end
     end
   end
-  end
 
   describe 'POST /projects/remote-import-s3' do
     subject do