Expanded ParameterAny handling

BO can now handle ParameterAny inputs by converting to and from Int
Tidied the code

tidy3d/plugins/design/method.py

@@ -376,7 +376,6 @@ def on_generation(ga_instance):
         gene_spaces = []
         gene_types = []
         for param in parameters:
-            _param_converter[param.name] = None
             if type(param) == tdd.ParameterFloat:
                 gene_spaces.append({"low": param.span[0], "high": param.span[1]})
                 gene_types.append(float)