haskell.packages.ghc912.patat: drop obsolete jailbreak

This seems to have been fixed. The build still fails, apparently due to
a pandoc update, but not due to a bound on time.

pkgs/development/haskell-modules/configuration-ghc-9.12.x.nix

@@ -74,6 +74,5 @@ with haskellLib;
 
   decimal-literals = doJailbreak super.decimal-literals; # base <4.21
   matrix-client = doJailbreak super.matrix-client; # time <1.13
-  patat = doJailbreak super.patat; # time <1.13
   puresat = doJailbreak super.puresat; # base <4.21
 }