Simplify pipelines count query

ee/app/helpers/projects/on_demand_scans_helper.rb

 # frozen_string_literal: true
 
 module Projects::OnDemandScansHelper
-  include API::Helpers::GraphqlHelpers
-
+  # rubocop: disable CodeReuse/ActiveRecord
   def on_demand_scans_data(project)
-    query = %(
-      {
-        project(fullPath: "#{project.full_path}") {
-          pipelines(source: "dast") {
-            count
-          }
-        }
-      }
-    )
-    pipelines_count = run_graphql!(
-      query: query,
-      context: { current_user: current_user },
-      transform: -> (result) { result.dig('data', 'project', 'pipelines', 'count') }
-    )
-
     common_data(project).merge({
-      'pipelines-count' => pipelines_count,
+      'pipelines-count' => project.all_pipelines.where(source: Enums::Ci::Pipeline.sources[:ondemand_dast_scan]).count,
       'new-dast-scan-path' => new_project_on_demand_scan_path(project),
       'empty-state-svg-path' => image_path('illustrations/empty-state/ondemand-scan-empty.svg')
     })
   end
+  # rubocop: enable CodeReuse/ActiveRecord
 
   def on_demand_scans_form_data(project)
     common_data(project).merge({

ee/spec/helpers/projects/on_demand_scans_helper_spec.rb

@@ -3,8 +3,6 @@
 require 'spec_helper'
 
 RSpec.describe Projects::OnDemandScansHelper do
-  include Devise::Test::ControllerHelpers
-
   let_it_be(:project) { create(:project) }
 
   before do
@@ -13,7 +11,7 @@ RSpec.describe Projects::OnDemandScansHelper do
 
   describe '#on_demand_scans_data' do
     before do
-      allow(helper).to receive(:run_graphql!).and_return(12)
+      create_list(:ci_pipeline, 12, project: project, ref: 'master', source: :ondemand_dast_scan)
     end
 
     it 'returns proper data' do