Remove debug cruft. props dimadin. see #25948.

git-svn-id: https://develop.svn.wordpress.org/trunk@26215 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/theme.php

@@ -398,7 +398,6 @@ function wp_prepare_themes_for_js( $themes = null ) {
 			),
 		);
 	}
-	// var_dump( $prepared_themes );
 
 	return $prepared_themes;
 }