Remove unreachable `break` statements in `wp-admin/comments.php`. `break` is unnecessary after `die`, `exit`, and `wp_die`.

See #27882.

Built from https://develop.svn.wordpress.org/trunk@28289


git-svn-id: http://core.svn.wordpress.org/trunk@28117 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/comment.php

@@ -266,7 +266,6 @@ case 'unapprovecomment' :
 
 	wp_redirect( $redir );
 	die;
-	break;
 
 case 'editedcomment' :
 
@@ -291,11 +290,9 @@ case 'editedcomment' :
 	wp_redirect( $location );
 
 	exit();
-	break;
 
 default:
 	wp_die( __('Unknown action.') );
-	break;
 
 } // end switch