drop clear_views in surface_texture_discard

Fixes #4056

wgpu-core/src/present.rs

@@ -386,10 +386,24 @@ impl<G: GlobalIdentityHandlerFactory> Global<G> {
 
             // The texture ID got added to the device tracker by `submit()`,
             // and now we are moving it away.
+            log::debug!(
+                "Removing swapchain texture {:?} from the device tracker",
+                texture_id.value
+            );
             device.trackers.lock().textures.remove(texture_id.value);
 
             let (texture, _) = hub.textures.unregister(texture_id.value.0, &mut token);
             if let Some(texture) = texture {
+                if let resource::TextureClearMode::RenderPass { clear_views, .. } =
+                    texture.clear_mode
+                {
+                    for clear_view in clear_views {
+                        unsafe {
+                            hal::Device::destroy_texture_view(&device.raw, clear_view);
+                        }
+                    }
+                }
+
                 let suf = A::get_surface_mut(surface);
                 match texture.inner {
                     resource::TextureInner::Surface {