code: public int deleteIndex(long geomId) {
  		int deleted = 0;
  		GeometryIndexKey key = new GeometryIndexKey(tableName, geomId);
  		try {
  			deleted = geometryIndexDao.deleteById(key);
  		} catch (SQLException e) {
  			throw new GeoPackageException(
  					"Failed to delete index, GeoPackage: "
  							+ geoPackage.getName() + ", Table Name: "
  							+ tableName + ", Geometry Id: " + geomId, e);
  		}
  		return deleted;
  	}
docs: Delete the index for the geometry id
  
  @param geomId
  geometry id
  
  @return deleted rows, should be 0 or 1