Remove unnecessary `deriving Typeable` from generated Haskell code

[MatthewDaggitt]

BNFC currently generates deriving (C.Typeable) clauses, but since GHC 7.10 all instances of Typeable are autoderived.

Recent versions of GHC have now started warning about this.

It looks like BNFC only supports GHC 8.10 and later so these deriving statements should probably be removed?

[andreasabel]

BNFC only supports GHC 8.10

I guess you meant 7.10.
Yes, they are obsolete and shall be removed!

[MatthewDaggitt]

I don't suppose we could get a release of 2.9.5.1 in order to use this fix downstream?

[andreasabel]

Ok I released 2.9.6:

• https://github.com/BNFC/bnfc/releases/tag/v2.9.6
• https://hackage.haskell.org/package/BNFC-2.9.6