geopackage-sdk/src/main/java/mil/nga/geopackage/extension/style/FeatureStyleExtension.java
public void deleteIcon(String featureTable, long featureId,
                           GeometryType geometryType) {
        deleteMapping(getIconMappingDao(featureTable), featureId, geometryType);
    }
public void deleteIcon(String featureTable, long featureId,
                           GeometryType geometryType) {
        deleteMapping(getIconMappingDao(featureTable), featureId, geometryType);
    }
Delete the feature row icon for the geometry type

@param featureTable feature table
@param featureId    feature id
@param geometryType geometry type