decoder: Use glycin for image loading expect SVG

This gives us sandboxed image decoding and others the
option to extend Loupe with other image formats.

src/util/mod.rs

@@ -246,31 +246,3 @@ pub fn spawn<R: 'static, F: std::future::Future<Output = R> + 'static>(
     let ctx = glib::MainContext::default();
     ctx.spawn_local(f)
 }
-
-pub fn new_trafo<F: Copy>(
-    icc_profile: &[u8],
-    src_format: lcms2::PixelFormat,
-) -> anyhow::Result<lcms2::Transform<F, F>> {
-    let src_profile = lcms2::Profile::new_icc(icc_profile).context("Invalid ICC profile")?;
-
-    let target_profile = lcms2::Profile::new_srgb();
-
-    Ok(lcms2::Transform::new(
-        &src_profile,
-        src_format,
-        &target_profile,
-        src_format,
-        lcms2::Intent::Perceptual,
-    )?)
-}
-
-pub fn appply_icc_profile<F: Copy>(
-    icc_profile: &[u8],
-    src_format: lcms2::PixelFormat,
-    buf: &mut [F],
-) {
-    match new_trafo(icc_profile, src_format) {
-        Ok(trafo) => trafo.transform_in_place(buf),
-        Err(err) => log::warn!("Failed to apply ICC profile: {err}"),
-    }
-}