The remove devices command now supports taking a list of udids and list of serials. You can provide list or the other or both. The remove command will simply loop through all devices passed in and attempt to delete.
The new remove devices command takes a UDID or list of UDIDs
as input and calls the devices delete endpoint. Since serial number
isn't strictly required by the spec it seemed to make more sense
to keep the remove working with only UDIDs. The get devices command
with a serial number filter can always be used to look up a UDID
from a serial number.
