yaft: disable unused dcs functions

src/gui/widget/yaft/ctrlseq/dcs.h

@@ -1,5 +1,6 @@
 /* See LICENSE for licence details. */
 /* function for dcs sequence */
+#error must no longer be included
 enum {
 	RGBMAX = 255,
 	HUEMAX = 360,

src/gui/widget/yaft/fb/common.h

@@ -413,6 +413,7 @@ void fb_die(struct framebuffer_t *fb)
 #endif
 }
 
+#if 0
 static inline void draw_sixel(struct framebuffer_t *fb, int line, int col, uint8_t *pixmap)
 {
 	int h, w, src_offset, dst_offset;
@@ -430,6 +431,7 @@ static inline void draw_sixel(struct framebuffer_t *fb, int line, int col, uint8
 		}
 	}
 }
+#endif
 
 static inline void draw_line(struct framebuffer_t *fb, struct terminal_t *term, int line)
 {
@@ -445,11 +447,13 @@ static inline void draw_line(struct framebuffer_t *fb, struct terminal_t *term,
 		/* target cell */
 		cellp = &term->cells[line][col];
 
+#if 0
 		/* draw sixel pixmap */
 		if (cellp->has_pixmap) {
 			draw_sixel(fb, line, col, cellp->pixmap);
 			continue;
 		}
+#endif
 
 		/* copy current color_pair (maybe changed) */
 		color_pair = cellp->color_pair;

src/gui/widget/yaft/terminal.h

@@ -8,7 +8,9 @@ void erase_cell(struct terminal_t *term, int y, int x)
 	cellp->color_pair = term->color_pair; /* bce */
 	cellp->attribute  = ATTR_RESET;
 	cellp->width      = HALF;
+#if 0
 	cellp->has_pixmap = false;
+#endif
 
 	term->line_dirty[y] = true;
 }
@@ -54,7 +56,9 @@ int set_cell(struct terminal_t *term, int y, int x, const struct glyph_t *glyphp
 
 	cell.attribute  = term->attribute;
 	cell.width      = (glyph_width)glyphp->width;
+#if 0
 	cell.has_pixmap = false;
+#endif
 
 	cellp    = &term->cells[y][x];
 	*cellp   = cell;

src/gui/widget/yaft/yaft.h

@@ -114,10 +114,12 @@ struct cell_t {
 	struct color_pair_t color_pair; /* color (fg, bg) */
 	/*enum char_attr*/ int attribute;       /* bold, underscore, etc... */
 	enum glyph_width width;         /* wide char flag: WIDE, NEXT_TO_WIDE, HALF */
+#if 0
 	bool has_pixmap;                /* has sixel pixmap data or not */
 	/*	sixel pixmap data:
 		must be statically allocated for copy_cell() */
 	uint8_t pixmap[BYTES_PER_PIXEL * CELL_WIDTH * CELL_HEIGHT];
+#endif
 };
 
 struct esc_t {