notcurses-demo: remove stray notcurses_refresh() calls

src/demo/chunli.c

@@ -13,10 +13,10 @@ chunli_draw(struct notcurses* nc, const char* ext, int count, const nccell* b){
   chunli chuns[CHUNS];
   char file[20];
   int dimx, dimy;
+  ncplane_dim_yx(notcurses_stdplane_const(nc), &dimy, &dimx);
   struct timespec iterdelay;
   timespec_div(&demodelay, 10, &iterdelay);
   for(int i = 0 ; i < count ; ++i){
-    notcurses_refresh(nc, &dimy, &dimx);
     snprintf(file, sizeof(file), "chunli%d.%s", i + 1, ext);
     chuns[i].path = find_data(file);
     chuns[i].ncv = ncvisual_from_file(chuns[i].path);
@@ -50,7 +50,7 @@ int chunli_demo(struct notcurses* nc){
   struct timespec iterdelay;
   timespec_div(&demodelay, 10, &iterdelay);
   int ret, dimx, dimy;
-  notcurses_refresh(nc, &dimy, &dimx);
+  ncplane_dim_yx(notcurses_stdplane_const(nc), &dimy, &dimx);
   nccell b = CELL_TRIVIAL_INITIALIZER;
   nccell_set_fg_alpha(&b, NCALPHA_TRANSPARENT);
   nccell_set_bg_alpha(&b, NCALPHA_TRANSPARENT);

src/demo/whiteout.c

@@ -591,7 +591,6 @@ int witherworm_demo(struct notcurses* nc){
         DEMO_RENDER(nc);
       }
     }while(key == NCKEY_RESIZE);
-    notcurses_refresh(nc, NULL, NULL);
   }
   ncplane_set_scrolling(n, false);
   return 0;