[FIX] mail: prevent traceback when the audio of a peer is loaded

Before this commit, we would reset the audio of a peer before setting a
new one which is not necessary as the track remains the same for the
whole lifetime of the transceiver (and therefore the peerConnection).

Moreover, calling `pause` on the audioElement could lead to a race
condition with the following `play` and lead to a traceback.

closes odoo/odoo#77883

X-original-commit: e0b957cd3cd657ad15168e35fdaaeebccb7be4be
Signed-off-by: Sébastien Theys (seb) <seb@odoo.com>

addons/mail/static/src/models/rtc_session/rtc_session.js

@@ -65,7 +65,6 @@ function factory(dependencies) {
          * @param {boolean} param0.isTalking
          */
         async setAudio({ audioStream, isMuted, isTalking }) {
-            this._removeAudio();
             const audioElement = this.audioElement || new window.Audio();
             try {
                 audioElement.srcObject = audioStream;