Allow empty src for script module for the sake of Tests_Blocks_Register::test_missing_asset_file_register_block_script_module_id

Author: westonruter

src/wp-includes/class-wp-script-modules.php

@@ -16,7 +16,7 @@
  *     import: 'static'|'dynamic',
  * }
  * @phpstan-type ScriptModule array{
- *     src: non-empty-string,
+ *     src: string,
  *     version: string|false|null,
  *     dependencies: Dependency[],
  *     in_footer: bool,
@@ -133,10 +133,6 @@ public function register( string $id, string $src, array $deps = array(), $versi
 			_doing_it_wrong( __METHOD__, __( 'Non-empty string required for id.' ), '6.9.0' );
 			return;
 		}
-		if ( '' === $src ) {
-			_doing_it_wrong( __METHOD__, __( 'Non-empty string required for src.' ), '6.9.0' );
-			return;
-		}
 
 		if ( ! isset( $this->registered[ $id ] ) ) {
 			$dependencies = array();