Have ExtensionAppModelBuilder call RemoveApp

There's no behavior change, other than removing a DVLOG(2) message. But
calling AppListModelBuilder's (the superclass') RemoveApp makes the
ExtensionAppModelBuilder consistent with the other AppListModelBuilder
sub-classes' methods (which all call AppListModelBuilder::RemoveApp):
  - AppServiceAppModelBuilder::OnAppUpdate
  - ArcAppModelBuilder::RemoveApp
  - CrostiniAppModelBuilder::OnRegistryUpdated

Change-Id: Ic77e49f3e30125031796d40b629550326275da92
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1705480
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Nigel Tao <nigeltao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#678926}
1 file changed