remove duplicate item

Author: tsolakoua

src/main/java/com/amadeus/Constants.java

@@ -45,7 +45,6 @@ public final class Constants {
 
   // APIs which need an X-HTTP-Method-Override GET HEADER
   public static final List<String> APIS_WITH_EXTRA_HEADER = new ArrayList<String>(Arrays.asList(
-      "/v2/shopping/flight-offers",
       "/v2/shopping/flight-offers",
       "/v1/shopping/seatmaps",
       "/v1/shopping/availability/flight-availabilities",