Removes a unit from the field and memory entirely.
This differs from BlueRemoveUnit in that it works immediately, allowing you to Add another unit/sprite right away, and that a Removed unit doesn't award its War Trophy.
Unit ID : Byte (hex)
ID of the unit specified in the ENTD.
x00 : Byte (hex)
This value is always set to x00 in the original game; it probably doesn't have a function.