Happy emits {-# LANGUAGE PartialTypeSignatures #-} twice

[andreasabel]

Happy emits {-# LANGUAGE PartialTypeSignatures #-} twice, e.g in this happy-generated file:

happy/lib/frontend/src/Happy/Frontend/Parser.hs

Lines 10 to 13 in 6596a2a

	{-# LANGUAGE PartialTypeSignatures #-}
	#if __GLASGOW_HASKELL__ >= 710
	{-# LANGUAGE PartialTypeSignatures #-}
	#endif

This leads to plaguing hlint warnings:

Since we dropped GHC 7, we can drop all the >=7.10 conditionals to fix this issue.

See also:

• Exclude auto-generated files from hlint hints haskell-language-server#4662