stop running test in python 3.8

chromium[1] and cros[2] have both moved to 3.11 which is the version
depot_tools use by default right now. Therefore, we should stop running
tests using python 3.8 to ensure compatibility and start using features
introduced after python 3.8

[1]: https://issues.chromium.org/40942322
[2]: http://b/318531403

Change-Id: I2bac00421a46793717387cec1898035b10b13b9e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/6306285
Commit-Queue: Yiwei Zhang <yiwzhang@google.com>
Auto-Submit: Yiwei Zhang <yiwzhang@google.com>
Reviewed-by: Josip Sokcevic <sokcevic@chromium.org>
Commit-Queue: Josip Sokcevic <sokcevic@chromium.org>

tests/.vpython3

@@ -1,104 +0,0 @@
-# TODO - crbug/346784198: Delete this file once the entire infra is on 3.11 so
-# that the vpython spec under the root directory will be used.
-
-python_version: "3.8"
-# The default set of platforms vpython checks for does not yet include mac-arm64.
-# Setting `verify_pep425_tag` to the list of platforms we explicitly must support
-# allows us to ensure that vpython specs stay mac-arm64-friendly
-verify_pep425_tag: [
-    {python: "cp38", abi: "cp38", platform: "manylinux1_x86_64"},
-    {python: "cp38", abi: "cp38", platform: "linux_arm64"},
-    {python: "cp38", abi: "cp38", platform: "macosx_10_10_intel"},
-    {python: "cp38", abi: "cp38", platform: "macosx_11_0_arm64"},
-    {python: "cp38", abi: "cp38", platform: "win32"},
-    {python: "cp38", abi: "cp38", platform: "win_amd64"}
-]
-
-# Used by:
-#   auth.py
-#   gerrit_util.py
-#   git_cl.py
-#   my_activity.py
-#   TODO(crbug.com/1002153): Add ninjalog_uploader.py
-wheel: <
-  name: "infra/python/wheels/httplib2-py3"
-  version: "version:0.13.1"
->
-wheel: <
-  name: "infra/python/wheels/six-py2_py3"
-  version: "version:1.10.0"
->
-
-# Used by:
-#    presubmit_support.py
-wheel: <
-  name: "infra/python/wheels/requests-py3"
-  version: "version:2.31.0"
->
-wheel: <
-  name: "infra/python/wheels/charset_normalizer-py3"
-  version: "version:2.0.4"
->
-wheel: <
-  name: "infra/python/wheels/urllib3-py2_py3"
-  version: "version:1.26.6"
->
-wheel: <
-  name: "infra/python/wheels/idna-py2_py3"
-  version: "version:2.8"
->
-wheel: <
-  name: "infra/python/wheels/brotli/${vpython_platform}"
-  version: "version:1.0.9"
->
-
-# Used by:
-#    presubmit_canned_checks.py (via zoneinfo)
-wheel: <
-  name: "infra/python/wheels/tzdata-py2_py3"
-  version: "version:2023.4"
->
-
-# Used by:
-#   my_activity.py
-wheel: <
-  name: "infra/python/wheels/python-dateutil-py2_py3"
-  version: "version:2.7.3"
->
-
-# May be required to talk to 3P servers.
-# Fixes https://crbug.com/1255921
-wheel: <
-  name: "infra/python/wheels/certifi-py2_py3"
-  version: "version:2021.5.30"
->
-
-# Used by:
-#   autoninja.py
-wheel: <
-  name: "infra/python/wheels/google-auth-py3"
-  version: "version:2.16.2"
->
-wheel: <
-  name: "infra/python/wheels/cachetools-py3"
-  version: "version:4.2.2"
->
-wheel: <
-  name: "infra/python/wheels/pyasn1_modules-py2_py3"
-  version: "version:0.2.8"
->
-wheel: <
-  name: "infra/python/wheels/rsa-py3"
-  version: "version:4.7.2"
->
-wheel: <
-  name: "infra/python/wheels/pyasn1-py2_py3"
-  version: "version:0.4.8"
->
-
-# Used by:
-#   tests/autoninja_test.py
-wheel: <
-  name: "infra/python/wheels/parameterized-py2_py3"
-  version: "version:0.8.1"
->