code: public void removeRelationship(String baseTableName,
  			String relatedTableName, RelationType relationType) {
  		removeRelationship(baseTableName, relatedTableName,
  				relationType.getName());
  	}
docs: Remove a specific relationship from the GeoPackage
  
  @param baseTableName
  base table name
  @param relatedTableName
  related table name
  @param relationType
  relation type