clean code

packages/app/src/styles/_comment.scss

@@ -11,7 +11,7 @@
 
 
 .page-comments {
-  // TODO: Never use this class.
+  // TODO: Never use .page-comments-list-toggle-older class.
   .page-comments-list-toggle-older {
     display: inline-block;
     font-size: 0.9em;

packages/app/src/styles/_comment_growi.scss

@@ -1,13 +1,13 @@
 .growi {
-  // TODO: Never use these classes.
-
   // display cheatsheet for comment form only
   .comment-form {
+    // TODO: Never use .editor-cheatsheet class.
     .editor-cheatsheet {
       display: none;
     }
 
     // textarea
+    // TODO: Never use .comment-form-comment class.
     .comment-form-comment {
       height: 80px;
       &:focus,