chore: remove duplicate word in comments (#15607)

Signed-off-by: Abirdcfly <fp544037857@gmail.com>

Signed-off-by: Abirdcfly <fp544037857@gmail.com>

cmd/test-utils_test.go

@@ -1577,7 +1577,7 @@ func ExecObjectLayerAPIAnonTest(t *testing.T, obj ObjectLayer, testName, bucketN
 	unknownSignTestStr := "Unknown HTTP signature test"
 
 	// simple function which returns a message which gives the context of the test
-	// and then followed by the the actual error message.
+	// and then followed by the actual error message.
 	failTestStr := func(testType, failMsg string) string {
 		return fmt.Sprintf("MinIO %s: %s fail for \"%s\": \n<Error> %s", instanceType, testType, testName, failMsg)
 	}