[rust] delete uneeded examples for closed issues

rust/examples/issue-1716.rs

@@ -1,29 +0,0 @@
-use libnotcurses_sys::*;
-
-const W: u32 = 32;
-const H: u32 = 32;
-
-fn main() {
-    let nc = NcDirect::new().expect("couldn’t create ncdirect");
-    nc.check_pixel_support()
-        .expect("failed to check for sixel support");
-
-    // create a purple rectangle
-    let mut buffer = Vec::<u8>::with_capacity(H as usize * W as usize * 4);
-    #[allow(unused_parens)]
-    for _byte in (0..={ H * W }) {
-        buffer.push(190);
-        buffer.push(20);
-        buffer.push(80);
-        buffer.push(255);
-    }
-
-    let vframe1 = NcDirectF::from_bgra(&buffer, H, W * 4, W).expect("couldn’t create visual");
-    let voptions1 = NcVisualOptions::without_plane(0, 0, 0, 0, H, W, NCBLIT_PIXEL, 0, 0);
-    let v = vframe1.ncdirectf_render(nc, &voptions1)
-        .expect("failed to render image to sixels");
-    nc.raster_frame(v, NCALIGN_LEFT).expect("failed to print sixels");
-    vframe1.ncdirectf_free();
-    nc.stop().expect("failed to destroy ncdirect context");
-    println!();
-}

rust/examples/issue-1751.rs

@@ -1,23 +0,0 @@
-use libnotcurses_sys::*;
-
-const W: u32 = 32;
-const H: u32 = 32;
-
-fn main() -> NcResult<()> {
-    let nc = Nc::new()?;
-
-    // create a white rectangle
-    let buffer = vec![255; H as usize * W as usize * 4];
-    let v = NcVisual::from_rgba(buffer.as_slice(), H, W * 4, W)?;
-    let vo = NcVisualOptions::without_plane(0, 0, 0, 0, H, W, NCBLIT_PIXEL, 0, 0);
-
-    // BUG: render function fails when downsizing
-    v.resize(H / 2, W / 2)?;
-    v.render(nc, &vo)?;
-
-    rsleep![nc, 1];
-
-    v.destroy();
-    nc.stop()?;
-    Ok(())
-}

rust/examples/issue-rgb_packed.rs

@@ -1,39 +0,0 @@
-use libnotcurses_sys::*;
-
-// BUGFIX DISCOVERINGS so far:
-//
-// - using a Height of 32, it only works with Widths: 1-18, 22-34, 43-50, …
-// - using a Height of 4, it only works with Widths: 1-34, 43-50, …
-
-const H: NcDim = 4;
-const W: NcDim = 35;
-
-fn main() -> NcResult<()> {
-    let mut nc = Nc::without_altscreen()?;
-    let mut plane = NcPlane::new(&mut nc, 0, 0, H, W)?;
-
-    let buffer_rgb = vec![255; H as usize * W as usize * 3];
-
-    let visual = NcVisual::from_rgb_packed(buffer_rgb.as_slice(), H, W * 3, W, 0xFE)?;
-    let voptions = NcVisualOptions::with_plane(
-        &mut plane,
-        NCSCALE_NONE,
-        0,
-        0,
-        0,
-        0,
-        0,
-        0,
-        NCBLIT_PIXEL,
-        0,
-        0,
-    );
-    visual.render(nc, &voptions)?;
-    plane.render()?;
-    plane.rasterize()?;
-    sleep![1];
-    plane.destroy()?;
-    visual.destroy();
-    nc.stop()?;
-    Ok(())
-}