Rodrigo Mesquita authored Jun 21, 2022 and Marge Bot committed Jul 30, 2024

Also migrate Fixity from GHC.Hs to Language.Haskell.Syntax
since it no longer uses any GHC-specific data types.

Fixed arrow desugaring bug. (This was dead code before.)
Remove mkOpFormRn, it is also dead code, only used in the arrow
desugaring now removed.

Co-authored-by: Fabian Kirchner <kirchner@posteo.de>
Co-authored-by: Alan Zimmerman <alan.zimm@gmail.com>