Clean up investigation code in DeleteHelper::DoDelete

Removing a local variable to keep it in the crash dump, that is added in:
http://crrev.com/c7f0b95fefa64b7bb0accea8aafc3fb819bfdcc7

BUG=393634

Review URL: https://codereview.chromium.org/562493004

Cr-Commit-Position: refs/heads/master@{#294143}

base/sequenced_task_runner_helpers.h

@@ -37,10 +37,6 @@ class DeleteHelper {
   template <class T2, class R> friend class subtle::DeleteHelperInternal;
 
   static void DoDelete(const void* object) {
-    // TODO(tzik): Remove this after http://crbug.com/393634 is fixed.
-    const char* function_name = __FUNCTION__;
-    debug::Alias(&function_name);
-
     delete reinterpret_cast<const T*>(object);
   }