fix: remove Prezi leftovers

css/_font.scss

 .icon-recEnable:before {
   content: "\e614";
 }
+// FIXME not used anymore - consider removing in the next font update
 .icon-presentation:before {
   content: "\e603";
 }

css/_videolayout_default.scss

     object-fit: cover;
 }
 
-#presentation,
 #sharedVideo,
 #etherpad,
 #localVideoWrapper>video,
     height: 100%;
 }
 
-#etherpad,
-#presentation {
+#etherpad {
     text-align: center;
 }
 

index.html

         </div>
         <div id="videospace">
             <div id="largeVideoContainer" class="videocontainer">
-                <div id="presentation"></div>
                 <div id="sharedVideo"><div id="sharedVideoIFrame"></div></div>
                 <div id="etherpad"></div>
                 <a target="_new"><div class="watermark leftwatermark"></div></a>