Let shellcheck handle good vs bad shell types

This matches official shellcheck pre-commit hook at [1]. This works because
shellcheck will silently skip "badShells" so there isn't a good reason to
do this here. The old setup was actually causing pre-commit to skip shell
scripts ending with .sh since both types *and* types_or were specified but
the identified tags resulted in an empty set:

$ cat t.sh

echo hi
$ nix-shell -p python3Packages.identify --run 'identify-cli t.sh'
["file", "non-executable", "shell", "text"]

An argument could be had that 'sh' should have shown up due to the extension similar to other shells but I still believe we should merge this and match upstream.

1: https://github.com/koalaman/shellcheck-precommit/blob/v0.9.0/.pre-commit-hooks.yaml#L7

modules/hooks.nix

@@ -1055,16 +1055,6 @@ in
           name = "shellcheck";
           description = "Format shell files.";
           types = [ "shell" ];
-          types_or =
-            # based on `goodShells` in https://github.com/koalaman/shellcheck/blob/master/src/ShellCheck/Parser.hs
-            [
-              "sh"
-              "ash"
-              "bash"
-              "bats"
-              "dash"
-              "ksh"
-            ];
           entry = "${tools.shellcheck}/bin/shellcheck";
         };
       bats =