Remove button in participant-room

src/app/participant-room/participant-room.component.html

@@ -23,9 +23,6 @@
         <button mat-button color="primary" matTooltip="Join question round">
           Questions
         </button>
-        <button mat-button color="primary" matTooltip="See room comments">
-          Comments
-        </button>
         <button mat-button color="primary" matTooltip="Start personal question round">
           Learn
         </button>