Extensions: Remove redundant code in Dispatcher::OnUpdatePermissions.

Code to set the policy host restrictions is duplicated in
Dispatcher::OnUpdatePermissions. Fix it.

BUG=None

Change-Id: I3cfc5cbe6b7565c2093204690bd88333a23f683a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1695758
Auto-Submit: Karan Bhatia <karandeepb@chromium.org>
Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Commit-Queue: Devlin <rdevlin.cronin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#676614}

extensions/renderer/dispatcher.cc

@@ -1167,13 +1167,6 @@ void Dispatcher::OnUpdatePermissions(
                                                 std::move(withheld));
   UpdateOriginPermissions(*extension);
 
-  if (params.uses_default_policy_host_restrictions) {
-    extension->permissions_data()->SetUsesDefaultHostRestrictions();
-  } else {
-    extension->permissions_data()->SetPolicyHostRestrictions(
-        params.policy_blocked_hosts, params.policy_allowed_hosts);
-  }
-
   bindings_system_->OnExtensionPermissionsUpdated(params.extension_id);
   UpdateBindings(extension->id());
 }