Remove studio mode.

It's not useful.

static/sfu.html

@@ -162,9 +162,6 @@
               <input id="blackboardbox" type="checkbox">Blackboard mode</input>
             </form>
   
-            <form>
-              <input id="studiobox" type="checkbox">Studio mode</input>
-            </form>
           </fieldset>
         </div>
 

static/sfu.js

@@ -79,7 +79,6 @@ function getUsername() {
  * @property {string} [request]
  * @property {boolean} [activityDetection]
  * @property {boolean} [blackboardMode]
- * @property {boolean} [studioMode]
  */
 
 /** @type{settings} */
@@ -215,8 +214,6 @@ function reflectSettings() {
 
     getInputElement('blackboardbox').checked = settings.blackboardMode;
 
-    getInputElement('studiobox').checked = settings.studioMode;
-
     if(store)
         storeSettings(settings);
 
@@ -450,14 +447,6 @@ getInputElement('blackboardbox').onchange = function(e) {
     changePresentation();
 }
 
-getInputElement('studiobox').onchange = function(e) {
-    e.preventDefault();
-    if(!(this instanceof HTMLInputElement))
-        throw new Error('Unexpected type for this');
-    updateSettings({studioMode: this.checked});
-    changePresentation();
-}
-
 document.getElementById('mutebutton').onclick = function(e) {
     e.preventDefault();
     let localMute = getSettings().localMute;
@@ -775,16 +764,6 @@ async function addLocalMedia(id, disableVideo) {
         settings.video ? {deviceId: settings.video} :
         false;
 
-    if(audio) {
-        if(settings.studioMode) {
-            audio.echoCancellation = false;
-            audio.noiseSuppression = false;
-            audio.channelCount = 2;
-            audio.latency = 0.01;
-            audio.autoGainControl = false;
-        }
-    }
-
     if(video) {
         if(settings.blackboardMode) {
             video.width = { min: 640, ideal: 1920 };