Jump statements should not be followed by other statements (there were 5 lingering).

See #30799.


git-svn-id: https://develop.svn.wordpress.org/trunk@31100 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/class-wp-upgrader.php

@@ -1896,7 +1896,7 @@ class Language_Pack_Upgrader extends WP_Upgrader {
 		switch ( $update->type ) {
 			case 'core':
 				return 'WordPress'; // Not translated
-				break;
+
 			case 'theme':
 				$theme = wp_get_theme( $update->slug );
 				if ( $theme->exists() )