rust/qemu-api-macros: use syn::Error directly

Our MacroError type wraps syn::Error as a variant, and uses another
variant for custom errors. Fortunately syn::Error can be used directly,
avoiding extra code on our side, so change the proc macro crate to use
it.

Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Link: https://lore.kernel.org/r/20250703-rust_macros-v1-1-b99f82febbbf@linaro.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 0 insertions, 26 deletions

diff --git a/rust/qemu-api-macros/src/utils.rs b/rust/qemu-api-macros/src/utils.rs
deleted file mode 100644
index 02c91ae..0000000
--- a/rust/qemu-api-macros/src/utils.rs
+++ /dev/null
@@ -1,26 +0,0 @@
-// Procedural macro utilities.
-// Author(s): Paolo Bonzini <pbonzini@redhat.com>
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-use proc_macro2::Span;
-use quote::quote_spanned;
-
-pub enum MacroError {
-    Message(String, Span),
-    ParseError(syn::Error),
-}
-
-impl From<syn::Error> for MacroError {
-    fn from(err: syn::Error) -> Self {
-        MacroError::ParseError(err)
-    }
-}
-
-impl From<MacroError> for proc_macro2::TokenStream {
-    fn from(err: MacroError) -> Self {
-        match err {
-            MacroError::Message(msg, span) => quote_spanned! { span => compile_error!(#msg); },
-            MacroError::ParseError(err) => err.into_compile_error(),
-        }
-    }
-}