Remove redundant context URLs from example.jsonld

Author: albertoabellagarcia

RainFallRadarObserved/examples/example.jsonld

@@ -48,8 +48,6 @@
   "rainFallRadarContent": "https://particuliers/rainFallRadar/NCE-RFRO-018-2020-03-17T08:30:00",
   "refDevice": "urn:ngsi-ld:Device:NCE-RFRO-018",
   "@context": [
-    "https://raw.githubusercontent.com/smart-data-models/data-models/master/context.jsonld",
-    "https://uri.etsi.org/ngsi-ld/v1/ngsi-ld-core-context.jsonld",
-    "https://raw.githubusercontent.com/smart-data-models/dataModel.Environment/master/context.jsonld"
+        "https://raw.githubusercontent.com/smart-data-models/dataModel.Environment/master/context.jsonld"
   ]
-}
+}