Revert "Do not rely on type aliases in archinfo." (#2122)
Revert "Do not rely on type aliases in archinfo." (#2122)

This reverts commit 54b8db75625c9528134cce948c96b4c2bc1a7a51.

This is now handled in archinfo, by declaring RegisterName as a Type Alias
https://docs.python.org/3/library/typing.html#type-aliases instead of a
NewType https://docs.python.org/3/library/typing.html#newtype

Co-authored-by: Florian Magin <cca7c3de8dde9e3b5078f3c5d3a7c66681cf23a8@users.noreply.github.com>
angr/angr,angr/angr,angr/angr