Remove agable from depot_tools OWNERS and TODOs

Change-Id: I0667af4562208a111ab3673f3fca6aab655f5f26
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2218962
Auto-Submit: Aaron Gable <agable@chromium.org>
Reviewed-by: Anthony Polito <apolito@google.com>
Commit-Queue: Anthony Polito <apolito@google.com>
diff --git a/git_cl.py b/git_cl.py
index 4d999ed..612d4f9 100755
--- a/git_cl.py
+++ b/git_cl.py
@@ -2300,7 +2300,7 @@
 
     if self.GetIssue() and (reviewers or cc):
       # GetIssue() is not set in case of non-squash uploads according to tests.
-      # TODO(agable): non-squash uploads in git cl should be removed.
+      # TODO(crbug.com/751901): non-squash uploads in git cl should be removed.
       gerrit_util.AddReviewers(
           self._GetGerritHost(),
           self._GerritChangeIdentifier(),