stylix: remove coercing of fonts

This should hopefilly fix the infinite recursion errors in
danth#201 (comment)

stylix/fonts.nix

@@ -21,44 +21,7 @@ let
     };
   };
 
-  # A best hope mix of
-  #
-  # - lib.types.listOf
-  # - lib.types.nonEmptyListOf
-  # - lib.types.coercedTo
-  #
-  # My understanding is shallow and my hopes are high.
-  coercedToNonEmptyListOf = elemType: types.mkOptionType ({
-    name = "coercedToNonEmptyList of ${types.optionDescriptionPhrase (class: class == "noun" || class == "composite") elemType}";
-    descriptionClass = "composite";
-    check = x: if builtins.isList x then x != [ ] else elemType.check x;
-    merge = loc: defs:
-      let coerceVal = val: if builtins.isList val then val else [ val ];
-      in
-      builtins.map (x: x.value) (builtins.filter (x: x ? value)
-        (builtins.concatLists
-          (lists.imap1
-            (n: def:
-              lists.imap1
-                (m: def':
-                  (mergeDefinitions
-                    (loc ++ [ "[definition ${toString n}-entry ${toString m}]" ])
-                    elemType
-                    [{ inherit (def) file; value = def'; }]
-                  ).optionalValue
-                )
-                def.value
-            )
-            (builtins.map (def: def // { value = coerceVal def.value; }) defs))));
-    emptyValue = { }; # unset
-    getSubOptions = prefix: elemType.getSubOptions (prefix ++ [ "*" ]);
-    getSubModules = elemType.getSubModules;
-    substSubModules = m: coercedToNonEmptyListOf (elemType.substSubModules m);
-    functor = (defaultFunctor name) // { wrapped = elemType; };
-    nestedTypes.elemType = elemType;
-  });
-
-  fontList = coercedToNonEmptyListOf fontType;
+  fontList = types.nonEmptyListOf fontType;
 in
 {
   options.stylix.fonts = {