Remove assert
Remove assert

I just enabled g_assert, so some old disabled asserts are failing now.

flaxandteal/gasket-vte,pjm0616/vte,rvu95/vte,jessevdk/vte,aligo/vte,rvu95/vte,aligo/vte,asivokon/vte-fx,thestinger/vte-ng,pjm0616/vte,gloob/vte-copy,rvu95/vte,jessevdk/vte,asivokon/vte-fx,rvu95/vte,aligo/vte,gloob/vte-copy,flaxandteal/gasket-vte,flaxandteal/gasket-vte,pjm0616/vte,thestinger/vte-ng,saitoha/vte-sixel,asivokon/vte-fx,gloob/vte-copy,asivokon/vte-fx,thestinger/vte-ng,jessevdk/vte,flaxandteal/gasket-vte,saitoha/vte-sixel,saitoha/vte-sixel,jessevdk/vte