internal/trace: remove unreachable code
Change-Id: If5c9801e8954ce7f517b90ea6c30ea3e9eec09ee
GitHub-Last-Rev:
135c8473ae9bc4126f3acdf72b1aeb90b0022297
GitHub-Pull-Request: golang/go#66051
Reviewed-on: https://go-review.googlesource.com/c/go/+/568395
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Jorropo <jorropo.pgm@gmail.com>