Remove unused cncf_udpa and protoc_gen_validate patches

Failed in 37m 39s
:pipeline:
Print Test Summary for Shards
6/20
:mac: macOS (shard 5)curl -sS https://raw.githubusercontent.com/bazelbuild/continuous-integration/master/buildkite/bazelci.py?1720095743 -o bazelci.py && python3 bazelci.py runner --task=macos_v2 --http_config=https://raw.githubusercontent.com/fweikert/bazel/macos_v2/.bazelci/postsubmit.yml
Waited 4s
·
Ran in 1m 23s
Total Job Run Time: 10h 14m