Bug 1671609 - [devtools] Remove swapBrowser methods from DevTools transports r=ochameau

Depends on D93819

Differential Revision: https://phabricator.services.mozilla.com/D93820

devtools/shared/transport/child-transport.js

@@ -118,12 +118,6 @@ ChildDebuggerTransport.prototype = {
   startBulkSend: function() {
     throw new Error("Can't send bulk data to child processes.");
   },
-
-  swapBrowser(mm) {
-    this._removeListener();
-    this._mm = mm;
-    this._addListener();
-  },
 };
 
 exports.ChildDebuggerTransport = ChildDebuggerTransport;

devtools/shared/transport/js-window-actor-transport.js

@@ -54,10 +54,6 @@ class JsWindowActorTransport {
   startBulkSend() {
     throw new Error("startBulkSend not implemented for JsWindowActorTransport");
   }
-
-  swapBrowser(jsWindowActor) {
-    throw new Error("swapBrowser not implemented for JsWindowActorTransport");
-  }
 }
 
 exports.JsWindowActorTransport = JsWindowActorTransport;