Use SimpleParamName everywhere it's needed

jedi/inference/value/function.py

@@ -10,7 +10,7 @@ from jedi.inference import flow_analysis
 from jedi.inference.signature import TreeSignature
 from jedi.inference.arguments import AnonymousArguments
 from jedi.inference.filters import ParserTreeFilter, FunctionExecutionFilter
-from jedi.inference.names import ValueName, AbstractNameDefinition, ParamName
+from jedi.inference.names import ValueName, AbstractNameDefinition, SimpleParamName
 from jedi.inference.base_value import ContextualizedNode, NO_VALUES, \
     ValueSet, TreeValue, ValueWrapper
 from jedi.inference.lazy_value import LazyKnownValues, LazyKnownValue, \
@@ -69,8 +69,7 @@ class FunctionMixin(object):
         return ValueSet([BoundMethod(instance, self)])
 
     def get_param_names(self):
-        arguments = AnonymousArguments()
-        return [ParamName(self, param.name, arguments)
+        return [SimpleParamName(self, param.name)
                 for param in self.tree_node.get_params()]
 
     @property