Mothula soft/hard lock in ToH

[sosuke3]

Mothula soft/hard lock in ToH found by Devan2002 on discord. Said he got stuck between edge of platform and spikes after killing Mothula. Probably started falling state, but blocks kept him from moving far enough into pit to fall.

Probably need asm change to remove spikes after Mothula dies (currently the spikes that are moving in the room are removed, but the wall ones stay after death and do zero damage). Or we just need to exclude Mothula from ToH and GT3(?)