make verify suggested changes

pkg/monitortests/network/legacynetworkmonitortests/networking.go

@@ -249,7 +249,7 @@ func testPodSandboxCreation(events monitorapi.Intervals, clientConfig *rest.Conf
 	// add our successes
 	ret = append(ret, successes...)
 
-	return append(ret)
+	return ret
 }
 
 // categorizeBySubset returns a map keyed by category for failures and flakes.  If a category is present in both failures and flakes, all are listed under failures.