cp-tree.h (pushclass): Remove unneeded parameter.

cp:
	* cp-tree.h (pushclass): Remove unneeded parameter.
	* class.c (pushclass): Remove unneeded MODIFY parm. Adjust.
	(push_nested_class): Adjust pushclass call.
	* pt.c (instantiate_class_template): Likewise.
	* semantics.c (begin_class_definition): Likewise.

From-SVN: r70101