Remove code leftover that has never been used.

2019-08-28  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/90970
	* builtins.c (check_access): Remove assignment to maxread
	as it hasn't been used since when it was introduced in r255755.

From-SVN: r274983

gcc/ChangeLog

+2019-08-28  Martin Liska  <mliska@suse.cz>
+
+	PR tree-optimization/90970
+	* builtins.c (check_access): Remove assignment to maxread
+	as it hasn't been used since when it was introduced in r255755.
+
 2019-08-27  Martin Sebor  <msebor@redhat.com>
 
 	PR tree-optimization/91567

gcc/builtins.c

@@ -3475,11 +3475,6 @@ check_access (tree exp, tree, tree, tree dstwrite,
   if (maxread)
     {
       get_size_range (maxread, range);
-
-      /* Use the lower end for MAXREAD from now on.  */
-      if (range[0])
-	maxread = range[0];
-
       if (range[0] && dstsize && tree_fits_uhwi_p (dstsize))
 	{
 	  location_t loc = tree_nonartificial_location (exp);