Drop running_or_pending_build_count

app/models/ci/build.rb

@@ -359,7 +359,6 @@ module Ci
       project.execute_hooks(build_data.dup, :job_hooks)
       project.execute_services(build_data.dup, :job_hooks)
       PagesService.new(build_data).execute
-      project.running_or_pending_build_count(force: true)
     end
 
     def artifacts_metadata_entry(path, **options)

app/models/project.rb

@@ -1494,12 +1494,6 @@ class Project < ActiveRecord::Base
     update_column(:import_jid, nil)
   end
 
-  def running_or_pending_build_count(force: false)
-    Rails.cache.fetch(['projects', id, 'running_or_pending_build_count'], force: force) do
-      builds.running_or_pending.count(:all)
-    end
-  end
-
   # Lazy loading of the `pipeline_status` attribute
   def pipeline_status
     @pipeline_status ||= Gitlab::Cache::Ci::ProjectPipelineStatus.load_for_project(self)