cmd/bent: retire stale benchmark; disable one that requires user intervention

github.com/ethersphere/swarm is now stale, non-building abandonware.

tile38 opens a network port, which requires user intervention on Darwin.

Change-Id: Iab2bd2f107e799d808f288811e6b4ee8e7bdf1b3
Reviewed-on: https://go-review.googlesource.com/c/benchmarks/+/379814
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Pratt <mpratt@google.com>
3 files changed