Probably better to just remove this

res/css/views/voip/_CallView.scss

@@ -88,32 +88,7 @@ limitations under the License.
         border-radius: 2000px;
         overflow: hidden;
         position: relative;
-        /* Blurred avatar images & pause icon for on-hold removed for now
-        &::after {
-            position: absolute;
-            content: '';
-            width: 100%;
-            height: 100%;
-            top: 50%;
-            left: 50%;
-            transform: translate(-50%, -50%);
-            background-color: rgba(0, 0, 0, 0.6);
-            background-image: url('$(res)/img/voip/paused.svg');
-            background-position: center;
-            background-size: 40px;
-            background-repeat: no-repeat;
-        }
-        .mx_CallView_pip &::after {
-            background-size: 30px;
-        }
-        */
     }
-    /*
-    .mx_BaseAvatar {
-        filter: blur(20px);
-        overflow: hidden;
-    }
-    */
 }
 
 .mx_CallView_voice_holdText {