chore(users/Profpatsch/cas-serve): remove dependency on superrecord

The use of superrecord here can be replaced by simple labelled tuples.

Change-Id: I23690cd0b88896440521fe81e83347ef4773d4a0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7713
Reviewed-by: sterni <sternenseemann@systemli.org>
Autosubmit: Profpatsch <mail@profpatsch.de>
Reviewed-by: Profpatsch <mail@profpatsch.de>
Tested-by: BuildkiteCI

users/Profpatsch/my-prelude/default.nix

@@ -7,6 +7,7 @@ pkgs.haskellPackages.mkDerivation {
   src = depot.users.Profpatsch.exactSource ./. [
     ./my-prelude.cabal
     ./MyPrelude.hs
+    ./Label.hs
   ];
 
   isLibrary = true;