Drop the hello draw snippet from the README

The README links to examples/hello.c, so a copy of its draw callback
only goes stale.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 2 insertions, 14 deletions

diff --git a/README.md b/README.md
index d94edb1..a02ba9e 100644
--- a/README.md
+++ b/README.md
@@ -49,20 +49,8 @@ explicit backend with `yasl_display_spec.backend`.
 
 Include `<yasl/app.h>` and pass application callbacks to `yasl_run()`.
 The complete [hello.c](examples/hello.c) describes its window in
-`yasl_app_desc.window`, lets the runner quit when it is closed, and fills every pixel
-in its frame callback:
-
-```c
-static void draw(void *ud, struct yasl_surface *surface, struct yasl_frame_context *frame)
-{
-    (void)ud;
-    size_t count = (size_t)frame->size.x * frame->size.y;
-    for (size_t i = 0; i < count; i++)
-        frame->cpu.pixels[i] = 0xff306090;
-    if (!yasl_frame_present_cpu(frame, NULL, 0))
-        yasl_surface_destroy(surface);
-}
-```
+`yasl_app_desc.window`, lets the runner quit when it is closed, and fills every
+pixel with an RGB gradient in its frame callback.
 
 Toplevel creation sizes are logical pixels; drawing and input use device pixels.
 Targets are borrowed for one frame callback. Keep durable content in application