GFXLIB: remove lines_in_blit.
GFXLIB: remove hscale_uncopy.
GFXLIB: remove pj_alloc_mcga_rcel and pj_open_mcga_rcel.
GFXLIB: remove pj_rcel_custom_alloc and pj_rcel_custom_open.
GFXLIB: sluff rcircle.
GFXLIB: sluff blit_image.
GFXLIB: sluff frame_tofrect.