Removing unused, non-standard function in _Rb_tree

	* include/bits/stl_tree.h (_Rb_tree::erase(const Key*, const Key*)):
	Remove unused, non-standard function.

From-SVN: r271168

libstdc++-v3/ChangeLog

 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
 
+	* include/bits/stl_tree.h (_Rb_tree::erase(const Key*, const Key*)):
+	Remove unused, non-standard function.
+
 	* include/bits/regex.h (match_results::max_size()): Adjust return
 	value to account for prefix/suffix/unmatched subs.
 	(match_results::_M_resize(unsigned int)): Use _Base_type::assign to

libstdc++-v3/include/bits/stl_tree.h

@@ -1231,6 +1231,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	_M_erase_aux(__position);
       }
 #endif
+
       size_type
       erase(const key_type& __x);
 
@@ -1253,8 +1254,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       erase(const_iterator __first, const_iterator __last)
       { _M_erase_aux(__first, __last); }
 #endif
-      void
-      erase(const key_type* __first, const key_type* __last);
 
       void
       clear() _GLIBCXX_NOEXCEPT
@@ -2535,16 +2534,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
   template<typename _Key, typename _Val, typename _KeyOfValue,
 	   typename _Compare, typename _Alloc>
-    void
-    _Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::
-    erase(const _Key* __first, const _Key* __last)
-    {
-      while (__first != __last)
-	erase(*__first++);
-    }
-
-  template<typename _Key, typename _Val, typename _KeyOfValue,
-	   typename _Compare, typename _Alloc>
     typename _Rb_tree<_Key, _Val, _KeyOfValue,
 		      _Compare, _Alloc>::iterator
     _Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::