Remove extra prints I forgot to in previous cl.

Had some debugging logging in autoninjas test.  Removed it.  Lines were erroneously added in https://crrev.com/c/5272474 to address b/277197166

Lines initially added to debug a problem in during development.  In the initial review I received a +1 CR with a comment requesting they be removed.  I made the change, started the patchset upload, went to a meeting, forgot to enter the patchset comment (thinking I had done it before the meeting) and submitted the change without the patchset.  Basically context switching got me 😅
Bug: b/277197166
Change-Id: I504569c713dbca7302988c39230caf9e9e6fa2c0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/5292094
Reviewed-by: Bruce Dawson <brucedawson@chromium.org>
Reviewed-by: Ben Segall <bentekkie@google.com>
Commit-Queue: Bruce Dawson <brucedawson@chromium.org>
Auto-Submit: Michael Savigny <msavigny@google.com>

tests/autoninja_test.py

@@ -91,8 +91,6 @@ class AutoninjaTest(trial_dir.TestCase):
                 with self.assertRaises(SystemExit):
                     self.assertEqual(
                         autoninja.main(['autoninja.py', '-C', out_dir]), 1)
-                self.maxDiff = None
-                print(f.getvalue())
                 self.assertIn(
                     "The gn arg `use_goma=true` is no longer supported.",
                     f.getvalue())
@@ -115,8 +113,6 @@ class AutoninjaTest(trial_dir.TestCase):
                 with self.assertRaises(SystemExit):
                     self.assertEqual(
                         autoninja.main(['autoninja.py', '-C', out_dir]), 1)
-                self.maxDiff = None
-                print(f.getvalue())
                 self.assertIn(
                     "The gn arg `use_goma=true` is no longer supported.",
                     f.getvalue())