Complete removal of /info entity, it's correspondent carpet and two small changes (#1047)

* Remove no longer needed language packet mixin

* Make StringArgument properly return a StringArgument supplier, so `string` isn't `term`

Fixes gnembon/fabric-carpet#1044

* Complete removal of `/info entity` and it's correspondent carpet

Resolves gnembon/fabric-carpet#1033

* Remove yet another no longer needed mixin

src/main/java/carpet/script/command/CommandArgument.java

@@ -469,7 +469,7 @@ public abstract class CommandArgument
         }
 
         @Override
-        protected Supplier<CommandArgument> factory() { return WordArgument::new; }
+        protected Supplier<CommandArgument> factory() { return StringArgument::new; }
     }
 
     private static class WordArgument extends StringArgument