Index: trunk/resources/data/validator/unnecessary.mapcss
===================================================================
--- trunk/resources/data/validator/unnecessary.mapcss	(revision 17147)
+++ trunk/resources/data/validator/unnecessary.mapcss	(revision 17209)
@@ -67,15 +67,4 @@
   group: tr("unnecessary tag");
   fixRemove: "payment:cash";
-}
-
-/* see #10346, #15667 */
-way[waterway][oneway?] {
-  throwWarning: tr("{0} is unnecessary for {1}", "{1.key}", "{0.key}");
-  group: tr("unnecessary tag");
-  fixRemove: "{1.key}";
-}
-way[waterway][oneway=-1] {
-  throwWarning: tr("{0} is unnecessary for {1}. The flow direction is defined by the way direction.", "{1.key}", "{0.key}");
-  group: tr("unnecessary tag");
 }