dpwas: Clean up TODO comment for Run on OS Login UX

Per UX review, the only planned place to expose Run on OS Login
is via the context menu option on a web app listed in chrome://apps
list. This change cleans up a code comment indicating it might be
surfaced elsewhere in the UI.

Bug: 1110407
Change-Id: I43c5987d18ba42081b88eea723a776d556ea839c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2633878Reviewed-by: Chase Phillips <cmp@chromium.org>
Commit-Queue: Mike Jackson <mjackson@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#846254}

chrome/browser/ui/web_applications/web_app_menu_model.cc

@@ -83,9 +83,6 @@ void WebAppMenuModel::ExecuteCommand(int command_id, int event_flags) {
 }
 
 void WebAppMenuModel::Build() {
-  // TODO(crbug.com/897302): Expose UI for user opt out and reenable for the Run
-  // on OS Login feature.
-
   if (CreateActionToolbarOverflowMenu())
     AddSeparator(ui::UPPER_SEPARATOR);
   AddItemWithStringId(IDC_WEB_APP_MENU_APP_INFO,