Merge pull request kubernetes#90337 from gaurav1086/aws_use_TrimPrefix

[Provider/aws] use strings.TrimPrefix()

Author: k8s-ci-robot

staging/src/k8s.io/legacy-cloud-providers/aws/aws.go

@@ -1884,12 +1884,8 @@ func (c *Cloud) getMountDevice(
 	volumeStatus := map[EBSVolumeID]string{} // for better logging of volume status
 	for _, blockDevice := range info.BlockDeviceMappings {
 		name := aws.StringValue(blockDevice.DeviceName)
-		if strings.HasPrefix(name, "/dev/sd") {
-			name = name[7:]
-		}
-		if strings.HasPrefix(name, "/dev/xvd") {
-			name = name[8:]
-		}
+		name = strings.TrimPrefix(name, "/dev/sd")
+		name = strings.TrimPrefix(name, "/dev/xvd")
 		if len(name) < 1 || len(name) > 2 {
 			klog.Warningf("Unexpected EBS DeviceName: %q", aws.StringValue(blockDevice.DeviceName))
 		}