chore: pkg imported more than once (#1296)

diff --git a/stats/benchmark_test.go b/stats/benchmark_test.go
index fade54f..910cd17 100644
--- a/stats/benchmark_test.go
+++ b/stats/benchmark_test.go
@@ -20,7 +20,6 @@
 
 	"go.opencensus.io/stats"
 	"go.opencensus.io/stats/view"
-	_ "go.opencensus.io/stats/view" // enable collection
 	"go.opencensus.io/tag"
 )