Remove the >= 8.2 workaround once Cabal > 3.8.1.0 is released

[Mikolaj]

The && impl(ghc >= 8.2) workaround can then be removed, because the underlying problem is fixed on master and 3.8 branch. Actually, it's also worked around as a Cabal-syntax revision on Hackage (haskell/cabal#8371), but I guess it's safer to wait for the permanent fix.

[juhp]

(Btw/tangentially cabal-install-3.6.2.0 fails to build when hackage-security pulls in Cabal-syntax-3.8)

[Mikolaj]

@juhp: isn't this fixed in hackage-security 0.6.2.2?

[Mikolaj]

Huh, it probably isn't --- I only fixed this for very old GHCs and for the hackage-security test suite itself. I'm afraid that's a case of haskell/cabal#8370 and it can be worked around similarly as for hackage-security test suite in #281.

That would be embarrassing. We'd need to fix old versions of cabal due to regressions in a new version.

[Mikolaj]

Unless somebody has a fix for haskell/cabal#8370 and/or hackage-security.

[andreasabel]

We dropped GHC 8.2, so I guess this is resolved.