wasm: Fix permissions

Trying to get a tracks list on a MediaStream without setting
the src will generate an error in the callback and
muck up the permissions handling.

Pick-to: 6.5
Fixes: QTBUG-112901
Change-Id: Ide3a7336597fd0a08764e303dcc8f58755ba915d
Reviewed-by: Mikołaj Boc <Mikolaj.Boc@qt.io>

src/corelib/kernel/qpermissions_wasm.cpp

@@ -133,9 +133,6 @@ namespace
         qstdweb::PromiseCallbacks queryCallbacks;
         queryCallbacks.thenFunc = [device, cb](val mediaStream)
         {
-            val tracks = mediaStream.call<val>("getTracks");
-            if (!tracks.isUndefined() && !tracks.isNull())
-                tracks[0].call<void>("stop");
             updatePermission(device, wapiGranted, cb);
         };
         queryCallbacks.catchFunc = [device, cb](val error)