cmd/bent: remove three (sub)benchmarks that are low-information

Under pgo, these all claim to run in less than a nanosecond,
and probably get optimized into nothing or nearly so. "Data"
from these benchmarks is unlikely to produce good decisions.

Change-Id: If1355d75b5224358ea02630b0d03b39c48a4a1f5
Reviewed-on: https://go-review.googlesource.com/c/benchmarks/+/580780
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
1 file changed