draw_context_t's depth member is unused, remove it

Signed-off-by: Uli Schlachter <psychon@znc.in>
Signed-off-by: Julien Danjou <julien@danjou.info>

draw.c

@@ -204,7 +204,6 @@ draw_context_init(draw_context_t *d, int phys_screen,
     d->phys_screen = phys_screen;
     d->width = width;
     d->height = height;
-    d->depth = s->root_depth;
     d->visual = draw_screen_default_visual(s);
     d->pixmap = px;
     d->surface = cairo_xcb_surface_create(globalconf.connection, px, d->visual, width, height);

draw.h

@@ -95,7 +95,6 @@ typedef struct
     uint16_t width;
     uint16_t height;
     int phys_screen;
-    uint8_t depth;
     cairo_t *cr;
     cairo_surface_t *surface;
     PangoLayout *layout;