Fix project destroy_service to update samples_count properly

app/services/projects/destroy_service.rb

@@ -6,13 +6,15 @@ class DestroyService < BaseProjectService
     def execute # rubocop:disable Metrics/AbcSize
       authorize! project, to: :destroy?
 
+      deleted_samples_count = @project.samples.size
+
       project.namespace.destroy!
 
       create_activities if project.namespace.deleted?
 
       return unless project.namespace.deleted? && project.namespace.type != Namespaces::UserNamespace.sti_name
 
-      update_samples_count if @project.parent.type == 'Group'
+      update_samples_count(deleted_samples_count) if @project.parent.type == 'Group'
 
       project.namespace.update_metadata_summary_by_namespace_deletion
     end
@@ -31,8 +33,7 @@ def create_activities
                                                 }
     end
 
-    def update_samples_count
-      deleted_samples_count = @project.samples.size
+    def update_samples_count(deleted_samples_count)
       @project.parent.update_samples_count_by_destroy_service(deleted_samples_count)
     end
   end