fix #21688 - drop the warning for highway=milestone (patch by skyper)

git-svn-id: https://josm.openstreetmap.de/svn/trunk@18355 0c6e7542-c601-0410-84e7-c038aed88b3b

resources/data/validator/geometry.mapcss

@@ -252,7 +252,7 @@ node[tag("power") = parent_tag("power")] ∈ area[power] {
   group: tr("{0} inside {1}", "power", "power");
 }
 
-/* isolated nodes which should be part of a way; #10825, #15478 */
+/* isolated nodes which should be part of a way; #10825, #15478, #21688 */
 node:unconnected:in-downloaded-area[entrance],
 node:unconnected:in-downloaded-area[traffic_calming],
 node:unconnected:in-downloaded-area[highway=passing_place],
@@ -265,7 +265,6 @@ node:unconnected:in-downloaded-area[highway=give_way],
 node:unconnected:in-downloaded-area[highway=traffic_signals],
 node:unconnected:in-downloaded-area[highway=crossing],
 node:unconnected:in-downloaded-area[crossing],
-node:unconnected:in-downloaded-area[highway=milestone],
 node:unconnected:in-downloaded-area[railway=milestone],
 node:unconnected:in-downloaded-area[railway=crossing],
 node:unconnected:in-downloaded-area[railway=level_crossing],