chore: remove orphaned google/cloud/google_cloud_cpp_testing.bzl (googleapis/google-cloud-cpp-common#63)
chore: remove orphaned google/cloud/google_cloud_cpp_testing.bzl (googleapis/google-cloud-cpp-common#63)


googleapis/google-cloud-cpp,googleapis/google-cloud-cpp,googleapis/google-cloud-cpp,googleapis/google-cloud-cpp