list tweaks

src/main/java/carpet/script/value/FunctionSignatureValue.java

@@ -1,7 +1,6 @@
 package carpet.script.value;
 
 import carpet.script.exception.ExpressionException;
-import carpet.script.exception.InternalExpressionException;
 
 import java.util.List;
 
@@ -23,12 +22,6 @@ public class FunctionSignatureValue extends Value
         throw new ExpressionException("Function "+identifier+" is not defined yet");
     }
 
-    @Override
-    public String getTypeString()
-    {
-        throw new InternalExpressionException("How did you get here? Cannot get type of an internal struct.");
-    }
-
     @Override
     public Value clone()
     {