Enable more clippy lints (#6853)

* Follows https://github.com/emilk/egui/pull/6848

crates/egui_glow/src/lib.rs

@@ -73,7 +73,7 @@ macro_rules! check_for_gl_error_even_in_release {
 #[doc(hidden)]
 pub fn check_for_gl_error_impl(gl: &glow::Context, file: &str, line: u32, context: &str) {
     use glow::HasContext as _;
-    #[allow(unsafe_code)]
+    #[expect(unsafe_code)]
     let error_code = unsafe { gl.get_error() };
     if error_code != glow::NO_ERROR {
         let error_str = match error_code {

crates/egui_glow/src/painter.rs

@@ -296,7 +296,7 @@ impl Painter {
     /// So if in a [`egui::Shape::Callback`] you need to use an offscreen FBO, you should
     /// then restore to this afterwards with
     /// `gl.bind_framebuffer(glow::FRAMEBUFFER, painter.intermediate_fbo());`
-    #[allow(clippy::unused_self)]
+    #[expect(clippy::unused_self)]
     pub fn intermediate_fbo(&self) -> Option<glow::Framebuffer> {
         // We don't currently ever render to an offscreen buffer,
         // but we may want to start to in order to do anti-aliasing on web, for instance.
@@ -663,7 +663,6 @@ impl Painter {
         self.textures.get(&texture_id).copied()
     }
 
-    #[allow(clippy::needless_pass_by_value)] // False positive
     pub fn register_native_texture(&mut self, native: glow::Texture) -> egui::TextureId {
         self.assert_not_destroyed();
         let id = egui::TextureId::User(self.next_native_tex_id);
@@ -672,7 +671,6 @@ impl Painter {
         id
     }
 
-    #[allow(clippy::needless_pass_by_value)] // False positive
     pub fn replace_native_texture(&mut self, id: egui::TextureId, replacing: glow::Texture) {
         if let Some(old_tex) = self.textures.insert(id, replacing) {
             self.textures_to_destroy.push(old_tex);

crates/egui_glow/src/shader_version.rs

@@ -1,11 +1,10 @@
 #![allow(unsafe_code)]
 #![allow(clippy::undocumented_unsafe_blocks)]
 
-use std::convert::TryInto;
+use std::convert::TryInto as _;
 
 /// Helper for parsing and interpreting the OpenGL shader version.
 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
-#[allow(dead_code)]
 pub enum ShaderVersion {
     Gl120,
 

crates/egui_glow/src/vao.rs

@@ -27,7 +27,6 @@ pub(crate) struct VertexArrayObject {
 }
 
 impl VertexArrayObject {
-    #[allow(clippy::needless_pass_by_value)] // false positive
     pub(crate) unsafe fn new(
         gl: &glow::Context,
         vbo: glow::Buffer,