code: public AlertEntityConditionService remove(long entityId, String entityType, long conditionId)
      {
          QueryParameterList queryParams = new QueryParameterList();
          queryParams.add("entity_type", entityType);
          queryParams.add("condition_id", conditionId);
          HTTP.DELETE(String.format("/v2/alerts_entity_conditions/%d.json", entityId), null, queryParams);       
          return this;
      }
docs: Removes the given entity from the alert condition with the given id.
  @param entityId The id of the entity to remove
  @param entityType The type of the entity to remove
  @param conditionId The id of the alert condition from which to delete the entity
  @return This object