Drop support for GHC 9.0 #4340

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31 warnings

As of 2023-09-09, haskell/action/setup is no longer maintained, please switch to haskell-actions/setup (note: dash for slash).

The export item ‘Warn(..)’ suggests that

‘tyThingParent_maybe’ is exported by ‘module GHC.Types.TyThing’ and ‘tyThingParent_maybe’

‘addBootSuffixLocnOut’ is exported by ‘module GHC.Unit.Module’ and ‘addBootSuffixLocnOut’

‘SrcSpanAnn'’ is exported by ‘module GHC.Hs’ and ‘SrcSpanAnn'’

‘hscUpdateHPT’ is exported by ‘hscUpdateHPT’ and ‘hscUpdateHPT’

‘checkOldIface’ is exported by ‘module GHC.Iface.Recomp’ and ‘checkOldIface’

‘mkModuleGraph’ is exported by ‘module GHC.Unit.Module.Graph’ and ‘mkModuleGraph’

‘panicDoc’ is exported by ‘module GHC.Utils.Panic’ and ‘panicDoc’

‘panic’ is exported by ‘module GHC.Utils.Panic’ and ‘panic’

‘UniqFM’ is exported by ‘UniqFM’ and ‘module GHC.Types.Unique.FM’

The import of ‘Control.Applicative’ is redundant

Pattern synonym with no type signature:

Redundant constraint: Eq a