YEs
To Unroot Droid X
- open your trusty terminal app
- you should see a $ symbol, now do the following
- su
- now you should see a # symbol
- mount -o rw,remount -t ext3 /dev/block/mmcblk1p21 /system
- rm /system/app/Superuser.apk
- rm /system/bin/su
- rm /system/bin/busybox
- mount -o ro,remount -t ext3 /dev/block/mmcblk1p21 /system
- reboot your phone. Tada, no more root