[mirotalksfu] - remove unused, fix typo

public/views/Room.html

@@ -306,7 +306,6 @@
             <header id="participantsHeader" class="participants-header">
                 <div id="participantsTitle" class="participants-header-title"></div>
                 <div class="participants-header-options">
-                    <button id="participantsRefreshBtn" class="fas fa-sync-alt"></button>
                     <button id="participantsCloseBtn" class="fas fa-times"></button>
                 </div>
             </header>