Remove nixseparatedebuginfod input

It has been integrated in nixpkgs, so is no longer required.

Reviewed-by: Aleix Roca Nonell <aleix.rocanonell@bsc.es>

m/module/debuginfod.nix

@@ -1,12 +1,3 @@
-{ theFlake, ... }:
-
-let
-  nixseparatedebuginfod = theFlake.inputs.nixseparatedebuginfod;
-in
 {
-  imports = [
-    nixseparatedebuginfod.nixosModules.default
-  ];
-
   services.nixseparatedebuginfod.enable = true;
 }