Remove unused scope without_project_deleted

app/models/deploy_keys_project.rb

@@ -3,7 +3,6 @@
 class DeployKeysProject < ApplicationRecord
   belongs_to :project, inverse_of: :deploy_keys_projects
   belongs_to :deploy_key, inverse_of: :deploy_keys_projects
-  scope :without_project_deleted,  -> { joins(:project).where(projects: { pending_delete: false }) }
   scope :in_project, ->(project) { where(project: project) }
   scope :with_write_access, -> { where(can_push: true) }