DNR: Remove failing DCHECK in ActionTracker destructor.

This CL removes a failing DCHECK in ActionTracker destructor. The DCHECK
probably fails because it seems we might not receive tab close
notifications on shutdown.

BUG=1055034

Change-Id: Ic597adb39fa37038e4349741e66eae62341cc0bc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2076520
Commit-Queue: Kelvin Jiang <kelvinjiang@chromium.org>
Commit-Queue: Karan Bhatia <karandeepb@chromium.org>
Auto-Submit: Karan Bhatia <karandeepb@chromium.org>
Reviewed-by: Kelvin Jiang <kelvinjiang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#744834}

extensions/browser/api/declarative_net_request/action_tracker.cc

@@ -80,13 +80,6 @@ ActionTracker::ActionTracker(content::BrowserContext* browser_context)
 }
 
 ActionTracker::~ActionTracker() {
-  // Sanity check that only rules corresponding to the unknown tab ID remain.
-  DCHECK(std::all_of(
-      rules_tracked_.begin(), rules_tracked_.end(),
-      [](const std::pair<const ExtensionTabIdKey, TrackedInfo>& key_value) {
-        return key_value.first.secondary_id == extension_misc::kUnknownTabId;
-      }));
-
   DCHECK(pending_navigation_actions_.empty());
 }