WP_REST_Revisions_Controller::delete_item( WP_REST_Request $request )

	public function delete_item( $request ) {
		$revision = $this->get_revision( $request['id'] );
		if ( is_wp_error( $revision ) ) {
			return $revision;
		}

		$force = isset( $request['force'] ) ? (bool) $request['force'] : false;

		// We don't support trashing for revisions.
		if ( ! $force ) {
			/* translators: %s: force=true */
			return new WP_Error( 'rest_trash_not_supported', sprintf( __( "Revisions do not support trashing. Set '%s' to delete." ), 'force=true' ), array( 'status' => 501 ) );
		}

		$previous = $this->prepare_item_for_response( $revision, $request );

		$result = wp_delete_post( $request['id'], true );

		/**
		 * Fires after a revision is deleted via the REST API.
		 *
		 * @since WP-4.7.0
		 *
		 * @param (mixed) $result The revision object (if it was deleted or moved to the trash successfully)
		 *                        or false (failure). If the revision was moved to the trash, $result represents
		 *                        its new state; if it was deleted, $result represents its state before deletion.
		 * @param WP_REST_Request $request The request sent to the API.
		 */
		do_action( 'rest_delete_revision', $result, $request );

		if ( ! $result ) {
			return new WP_Error( 'rest_cannot_delete', __( 'The post cannot be deleted.' ), array( 'status' => 500 ) );
		}

		$response = new WP_REST_Response();
		$response->set_data( array( 'deleted' => true, 'previous' => $previous->get_data() ) );
		return $response;
	}