remove core-error error handling from api

test coverage has higlighted error handling in the api that is never invoked. Core Errors are never raised because the API uses it's own throw catch which by-passes them

So for clarity we need to remove core_error handling

if (is_a($eventBAO, 'CRM_Core_Error'))

{ return civicrm_api3_create_error("Event is not created"); }

else

{ $event = array(); _civicrm_api3_object_to_array($eventBAO, $event[$eventBAO->id]); }