Skip alterations to haskell env

These were meant to reduce closure size, but it doesn't seem like they
help.

default.nix

@@ -25,8 +25,5 @@ in
 haskell.lib.overrideCabal
   (hp.callPackage ./bookme.nix { })
   (drv: {
-    doCheck = false;
-    doHaddock = false;
-    enableLibraryProfiling = false;
     src = builtins.filterSource keep ./.;
   })