tests/e2e: remove string replace for v3.4.0-rc.1

Signed-off-by: Gyuho Lee <leegyuho@amazon.com>

tests/e2e/metrics_test.go

@@ -44,9 +44,6 @@ func metricsTest(cx ctlCtx) {
 	if strings.HasSuffix(ver, "-pre") {
 		ver = strings.Replace(ver, "-pre", "", 1)
 	}
-	if strings.HasSuffix(ver, "-rc.1") {
-		ver = strings.Replace(ver, "-rc.1", "", 1)
-	}
 
 	i := 0
 	for _, test := range []struct {