PR libstdc++/77936 remove unused variable

	PR libstdc++/77936
	* include/parallel/checkers.h (__is_sorted): Remove unused variable.

From-SVN: r276297

libstdc++-v3/ChangeLog

+2019-09-30  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/77936
+	* include/parallel/checkers.h (__is_sorted): Remove unused variable.
+
 2019-09-28  François Dumont  <fdumont@gcc.gnu.org>
 
 	* include/bits/stl_algo.h (merge): Fix documentation.

libstdc++-v3/include/parallel/checkers.h

@@ -55,7 +55,6 @@ namespace __gnu_parallel
 
       _IIter __current(__begin), __recent(__begin);
 
-      unsigned long long __position = 1;
       for (__current++; __current != __end; __current++)
         {
           if (__comp(*__current, *__recent))
@@ -63,7 +62,6 @@ namespace __gnu_parallel
               return false;
             }
           __recent = __current;
-          __position++;
         }
 
       return true;