Revert "presubmit: Fix checking if code-owners enabled for repo."

This reverts commit 70405c2f.

Reason for revert: doesn't work with depot_tools

error 404 Not found: tools

Bug: 1183975

Original change's description:
> presubmit: Fix checking if code-owners enabled for repo.
>
> Change-Id: I22e6a9d4405d92d26dfbfba64735b6e9ce92674c
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2729404
> Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>
> Commit-Queue: Josip Sokcevic <sokcevic@google.com>
> Auto-Submit: Edward Lesmes <ehmaldonado@chromium.org>
> Reviewed-by: Josip Sokcevic <sokcevic@google.com>

Change-Id: Ib358f31e7c4c6fc07f98db4758004097234eaa87
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2729408
Auto-Submit: Josip Sokcevic <sokcevic@google.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>

presubmit_support.py

@@ -470,7 +470,7 @@ class GerritAccessor(object):
   def IsCodeOwnersEnabledOnRepo(self):
     if self.code_owners_enabled is None:
       self.code_owners_enabled = gerrit_util.IsCodeOwnersEnabledOnRepo(
-          self.host, self.project)
+          self.host, self.repo)
     return self.code_owners_enabled