don't consider traffic_calming features as areas

prerequisite for https://github.com/openstreetmap/id-tagging-schema/pull/1076

modules/osm/tags.js

@@ -60,9 +60,6 @@ export var osmAreaKeysExceptions = {
         turntable: true,
         wash: true
     },
-    traffic_calming: {
-        island: true
-    },
     waterway: {
         dam: true
     }

modules/presets/index.js

@@ -302,7 +302,6 @@ export function presetIndex() {
       footway: true,
       railway: true,
       junction: true,
-      traffic_calming: true,
       type: true
     };
     let areaKeys = {};