build(macros): Drop pmutil to improve compile time (#8404)

**Description:**

`pmutil` born to die. Now almost all useful features are merged into `syn` and `quote`, so it's now just a compile-time bloat. (Although I didn't send PRs to them, sorry)

crates/ast_node/Cargo.toml

@@ -13,7 +13,6 @@ bench      = false
 proc-macro = true
 
 [dependencies]
-pmutil      = "0.6.1"
 proc-macro2 = "1"
 quote       = "1"
 

crates/ast_node/src/ast_node_macro.rs

@@ -1,4 +1,3 @@
-use pmutil::{smart_quote, Quote};
 use swc_macros_common::prelude::*;
 use syn::{
     self,
@@ -22,22 +21,16 @@ pub fn expand_struct(args: Args, i: DeriveInput) -> Vec<ItemImpl> {
     let generics = i.generics.clone();
     // let item_ident = Ident::new("Item", i.ident.span());
 
-    items.push(
-        Quote::new_call_site()
-            .quote_with(smart_quote!(
-                Vars {
-                    Type: i.ident.clone(),
-                    type_str: args.ty
-                },
-                {
-                    impl ::swc_common::AstNode for Type {
-                        const TYPE: &'static str = type_str;
-                    }
-                }
-            ))
-            .parse::<ItemImpl>()
-            .with_generics(generics),
-    );
+    {
+        let ty = &i.ident;
+        let type_str = &args.ty;
+        let item: ItemImpl = parse_quote!(
+            impl ::swc_common::AstNode for #ty {
+                const TYPE: &'static str = #type_str;
+            }
+        );
+        items.push(item.with_generics(generics));
+    }
 
     // let ident = i.ident.clone();
     // let cloned = i.clone();