iterm: use sixel_scrub for scrubbing

src/lib/sprite.h

@@ -176,7 +176,6 @@ int iterm_draw(const struct ncpile *p, sprixel* s, FILE* out, int y, int x);
 int kitty_move(sprixel* s, FILE* out, unsigned noscroll);
 int sixel_scrub(const struct ncpile* p, sprixel* s);
 int kitty_scrub(const struct ncpile* p, sprixel* s);
-int iterm_scrub(const struct ncpile* p, sprixel* s);
 int kitty_remove(int id, FILE* out);
 int kitty_clear_all(FILE* fp);
 int sixel_init(const tinfo* t, int fd);

src/lib/termdesc.c

@@ -76,8 +76,8 @@ setup_iterm_bitmaps(tinfo* ti, int fd){
   // notcurses-info to determine iTerm2 support.
   ti->pixel_move = NULL;
   ti->color_registers = 0;
+  ti->pixel_scrub = sixel_scrub;
   ti->pixel_draw = iterm_draw;
-  ti->pixel_scrub = iterm_scrub;
   ti->pixel_wipe = iterm_wipe;
   ti->pixel_rebuild = iterm_rebuild;
   ti->pixel_trans_auxvec = kitty_trans_auxvec;