pw_tls_client: Remove build_time gn print
pw_tls_client: Remove build_time gn print

Remove a left-over debug print in gn target of pw_tls_client:build_time

Change-Id: I2009ffffa71c4d0add5f6a2b9d78b8f89dde06f0
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/51047
Reviewed-by: Ali Zhang <101974175ff73f104389b21e58229a7713cff21f@google.com>
Commit-Queue: Ali Zhang <101974175ff73f104389b21e58229a7713cff21f@google.com>

google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed