sweet/common: remove redundant word in comment

Change-Id: I2b18c42e9799943f559142f54b5d6d51ec8aafe0
Reviewed-on: https://go-review.googlesource.com/c/benchmarks/+/690795
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

sweet/common/harness.go

diff --git a/sweet/common/harness.go b/sweet/common/harness.go
index 3df943e..0685aa7 100644
--- a/sweet/common/harness.go
+++ b/sweet/common/harness.go
@@ -73,7 +73,7 @@
 	// By convention, this is the benchmark binary's stdout.
 	Results *os.File
 
-	// Log contains additional information information from the benchmark,
+	// Log contains additional information from the benchmark,
 	// for example for debugging.
 	//
 	// By convention, this is the benchmark binary's stderr.