Revert base Parameter constructor back to it's original signature

pypika/terms.py

@@ -299,15 +299,12 @@ def named_placeholder_gen(idx: int) -> str:
 class Parameter(Term):
  is_aggregate = None
 
- def __init__(self, placeholder: Union[str, int, Callable[[int], str]] = idx_placeholder_gen) -> None:
+ def __init__(self, placeholder: Union[str, int]) -> None:
  super().__init__()
  self._placeholder = placeholder
 
  @property
  def placeholder(self):
- if callable(self._placeholder):
- return self._placeholder(None)
-
  return self._placeholder
 
  def get_sql(self, **kwargs: Any) -> str:
@@ -322,8 +319,7 @@ def get_param_key(self, placeholder: Any, **kwargs):
 
 class ListParameter(Parameter):
  def __init__(self, placeholder: Union[str, int, Callable[[int], str]] = idx_placeholder_gen) -> None:
- super().__init__()
- self._placeholder = placeholder
+ super().__init__(placeholder=placeholder)
  self._parameters = list()
 
  @property
@@ -342,8 +338,7 @@ def update_parameters(self, value: Any, **kwargs):
 
 class DictParameter(Parameter):
  def __init__(self, placeholder: Union[str, int, Callable[[int], str]] = named_placeholder_gen) -> None:
- super().__init__()
- self._placeholder = placeholder
+ super().__init__(placeholder=placeholder)
  self._parameters = dict()
 
  @property