feat(ast_codegen): add ImplGetSpanGenerator. (#3852)

This one is ready to replace the handwritten module.

Author: rzvxa

Cargo.lock

@@ -9,7 +9,7 @@
 use std::{cell::Cell, hash::Hash};
 
 use oxc_allocator::Vec;
-use oxc_span::{Atom, GetSpan, Span};
+use oxc_span::{Atom, Span};
 
 use crate::ast::*;
 
@@ -103,15 +103,6 @@ impl<'a> TSTypeName<'a> {
     }
 }
 
-impl GetSpan for TSTypeName<'_> {
-    fn span(&self) -> Span {
-        match self {
-            TSTypeName::IdentifierReference(ident) => ident.span,
-            TSTypeName::QualifiedName(name) => name.span,
-        }
-    }
-}
-
 impl<'a> TSTypeParameter<'a> {
     pub fn new(
         span: Span,