sweet: remove sweet get -auth flag from README

Authentication is not required to download assets.

Change-Id: Ia2ba4a2acd57c40254026974b2c6eac35a5e0e61
Reviewed-on: https://go-review.googlesource.com/c/benchmarks/+/449176
Auto-Submit: Michael Pratt <mpratt@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Michael Pratt <mpratt@google.com>
1 file changed