fix: remove unnecessary conversion

Author: asuto15

src/tools/rust-analyzer/crates/ide/src/syntax_highlighting/highlight.rs

@@ -703,7 +703,7 @@ fn highlight_name_ref_by_syntax(
     };
 
     match parent.kind() {
-        EXTERN_CRATE => (HlTag::Symbol(SymbolKind::Module) | HlMod::CrateRoot).into(),
+        EXTERN_CRATE => HlTag::Symbol(SymbolKind::Module) | HlMod::CrateRoot,
         METHOD_CALL_EXPR => ast::MethodCallExpr::cast(parent)
             .and_then(|it| highlight_method_call(sema, krate, &it, edition))
             .unwrap_or_else(|| SymbolKind::Method.into()),