Stop net_unittests on chromeos-brya-chrome-dchecks-skylab

This is a follow-up of crrev.com/c/5222980.

This unittest fails on brya and has been disabled on the non-dcheck
brya builder (chromeos-brya-chrome-skylab). This CL disables it even
on the dcheck brya builder (chromeos-brya-chrome-dchecks-skylab).

BUG=b:319364912
TEST=None

Change-Id: Ife241e49733c7f7320fc201f8825fda2b34f0e46
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5276366
Commit-Queue: Yoshiki Iguchi <[email protected]>
Reviewed-by: Tatsuhisa Yamaguchi <[email protected]>
Reviewed-by: Takuto Ikuta <[email protected]>
Auto-Submit: Yoshiki Iguchi <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1257229}
diff --git a/testing/buildbot/test_suite_exceptions.pyl b/testing/buildbot/test_suite_exceptions.pyl
index d15d26f..40624133 100644
--- a/testing/buildbot/test_suite_exceptions.pyl
+++ b/testing/buildbot/test_suite_exceptions.pyl
@@ -3654,6 +3654,7 @@
   'net_unittests BRYA_RELEASE_LKGM': {
     # TODO(b/319364912): vpython cannot be delivered via CIPD on skylab builders
     'remove_from': [
+      'chromeos-brya-chrome-dchecks-skylab',
       'chromeos-brya-chrome-skylab',
     ],
   },