Unify TickImpl called during Device shutdown.

Bug: dawn:400
Change-Id: I26ad1a739d123ebc81a2e7d309c8a42f517be06c
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/22662
Commit-Queue: Natasha Lee <natlee@microsoft.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

src/dawn_native/opengl/DeviceGL.cpp

@@ -200,7 +200,6 @@ namespace dawn_native { namespace opengl {
         gl.Finish();
         CheckPassedSerials();
         ASSERT(mFencesInFlight.empty());
-        Tick();
 
         return {};
     }