cacert: Drop python3Minimal

This PR, https://github.com/NixOS/nixpkgs/pull/176291, started building
`cacert` with `python3Minimal` to work around an infinite recursion
problem with the `mailcap` build.

This causes problems now because `buildcatrust` requires the `_scproxy`
module and that's not built for `python3Minimal` on Darwin. This causes
many transitive failures. Simply building `cacert` with `python3` seems
to work fine.

The `mailcap` expression has since been altered and this infinite
recursion issue doesn't reappear.

pkgs/top-level/all-packages.nix

@@ -24192,10 +24192,7 @@ with pkgs;
 
   brise = callPackage ../data/misc/brise { };
 
-  cacert = callPackage ../data/misc/cacert {
-    # avoid an infinite recursion through mailcap
-    buildcatrust = with python3Minimal.pkgs; toPythonApplication buildcatrust;
-  };
+  cacert = callPackage ../data/misc/cacert { };
 
   caladea = callPackage ../data/fonts/caladea {};