ci: Fix dead code error on nightly

See https://github.com/rust-lang/rust/pull/118297

src/platform_impl/linux/x11/ime/callbacks.rs

@@ -79,9 +79,9 @@ pub(crate) unsafe fn set_destroy_callback(
 #[allow(clippy::enum_variant_names)]
 enum ReplaceImError {
     // Boxed to prevent large error type
-    MethodOpenFailed(Box<PotentialInputMethods>),
-    ContextCreationFailed(ImeContextCreationError),
-    SetDestroyCallbackFailed(XError),
+    MethodOpenFailed(#[allow(dead_code)] Box<PotentialInputMethods>),
+    ContextCreationFailed(#[allow(dead_code)] ImeContextCreationError),
+    SetDestroyCallbackFailed(#[allow(dead_code)] XError),
 }
 
 // Attempt to replace current IM (which may or may not be presently valid) with a new one. This

src/platform_impl/linux/x11/ime/input_method.rs

@@ -159,9 +159,9 @@ impl InputMethodResult {
 
 #[derive(Debug, Clone)]
 enum GetXimServersError {
-    XError(XError),
-    GetPropertyError(util::GetPropertyError),
-    InvalidUtf8(IntoStringError),
+    XError(#[allow(dead_code)] XError),
+    GetPropertyError(#[allow(dead_code)] util::GetPropertyError),
+    InvalidUtf8(#[allow(dead_code)] IntoStringError),
 }
 
 impl From<util::GetPropertyError> for GetXimServersError {

src/platform_impl/linux/x11/ime/mod.rs

@@ -52,7 +52,7 @@ pub enum ImeRequest {
 pub(crate) enum ImeCreationError {
     // Boxed to prevent large error type
     OpenFailure(Box<PotentialInputMethods>),
-    SetDestroyCallbackFailed(XError),
+    SetDestroyCallbackFailed(#[allow(dead_code)] XError),
 }
 
 pub(crate) struct Ime {