stl_tree.h (_Rb_tree<>::_Rb_tree_impl<, true>): Remove, identical in mainline to the primary template.

2007-11-22  Paolo Carlini  <pcarlini@suse.de>

	* include/bits/stl_tree.h (_Rb_tree<>::_Rb_tree_impl<, true>): Remove,
	identical in mainline to the primary template.

From-SVN: r130355