**Description:**
This would improve compile time by a margin, and this is a refactoring that should be done before applying `swc_allocator::boxed::Box` to ES AST.
This PR removes `swc_visit_macros` because we now use a simple binary to generate code before publishing.
**Related issue:**
- Closes https://github.com/swc-project/swc/issues/9101
**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)
