pw_presubmit: Remove unnecessary default values
pw_presubmit: Remove unnecessary default values

Bug: b/233808334
Change-Id: I0247355289f725e7940cb40722d8d4c4faac9f78
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/110330
Commit-Queue: Auto-Submit <14637eda5603879df170705285bf30f5996692f0@pigweed.google.com.iam.gserviceaccount.com>
Reviewed-by: Wyatt Hepler <cca3bedb37979eacd157a9bceb473582df8aea1e@google.com>
Pigweed-Auto-Submit: Rob Mohr <d07614a8a0b466db08f68224f87d738b0f9615cf@google.com>

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