[Extensions Cleanup] Remove commented-out include

An (illegal) include was commented out. Remove it.

Bug: None
Change-Id: Ief2da1cb5a3f381aeff1589f055fd12158bda1fc
Reviewed-on: https://chromium-review.googlesource.com/821110Reviewed-by: Karan Bhatia <karandeepb@chromium.org>
Commit-Queue: Devlin <rdevlin.cronin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#523265}

extensions/browser/lazy_background_task_queue_factory.cc

@@ -4,7 +4,6 @@
 
 #include "extensions/browser/lazy_background_task_queue_factory.h"
 
-//#include "chrome/browser/profiles/profile.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "extensions/browser/extension_registry_factory.h"
 #include "extensions/browser/extensions_browser_client.h"