I dont think so hammy:
ceiling, opposite wall and the wall where she wants them removed.
3x outlets. The last of which being the wall lights she wants removed (being on one of the switches on the 3 gang panel)
but only mention of one “the switch and replacing the 3 way switch with a 2 way”.
A 3-way switched supply entails lots of head scratching, you wouldnt replace with a “2 way”.
So, Id say, yes, he can terminate the wall light outlets and remove from the switched supply at the wall panel, replacing the 3gang switch with a 2gang switch since each of the outlets is only being switched by a single supply from one switch panel.