Fix clippy.

src/wasm/macros.rs

@@ -23,6 +23,7 @@ macro_rules! to_wasm {
                 &self,
                 $wasm_context: crate::wasm::to_wasm::ToWasmContext<'_>,
             ) -> Result<Self::Output, crate::error::CustomError> {
+                #[allow(unused_variables)]
                 let $original = self;
                 let standard_properties =
                     self.to_wasm_standard_properties($wasm_context.clone())?;
@@ -38,9 +39,8 @@ macro_rules! to_wasm {
             }
         }
 
-        impl Into<WasmAstNode> for crate::wasm::ast_node::WasmAstNodeWrapper<$ostruct> {
-            fn into(self) -> WasmAstNode {
-                let $original = self;
+        impl From<crate::wasm::ast_node::WasmAstNodeWrapper<$ostruct>> for WasmAstNode {
+            fn from($original: crate::wasm::ast_node::WasmAstNodeWrapper<$ostruct>) -> Self {
                 let ret = $toastnodebody;
                 ret
             }
@@ -48,7 +48,6 @@ macro_rules! to_wasm {
 
         impl<'s> crate::util::elisp_fact::ElispFact<'s> for $ostruct {
             fn get_elisp_name<'b>(&'b self) -> std::borrow::Cow<'s, str> {
-                let $original = self;
                 let ret = $elispnamebody;
                 ret
             }