sweet: delete unused isProfiling flag

Change-Id: I6c099b235062b4430d21e5d6242f44ce9657e989
Reviewed-on: https://go-review.googlesource.com/c/benchmarks/+/600055
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Auto-Submit: Austin Clements <austin@google.com>
3 files changed