Drop the unused `setUnauthenticatedDelivery` endpoint

service/src/main/java/org/whispersystems/textsecuregcm/controllers/DeviceController.java

@@ -400,14 +400,6 @@ public class DeviceController {
     }
   }
 
-  @PUT
-  @Produces(MediaType.APPLICATION_JSON)
-  @Path("/unauthenticated_delivery")
-  public void setUnauthenticatedDelivery(@Mutable @Auth AuthenticatedDevice auth) {
-    assert (auth.getAuthenticatedDevice() != null);
-    // Deprecated
-  }
-
   @PUT
   @Produces(MediaType.APPLICATION_JSON)
   @Path("/capabilities")