code: public static void deleteFeatureStyleExtension(GeoPackageCore geoPackage) {
  
  		FeatureCoreStyleExtension featureStyleExtension = getFeatureStyleExtension(geoPackage);
  		if (featureStyleExtension.has()) {
  			featureStyleExtension.removeExtension();
  		}
  
  	}
docs: Delete the Feature Style extension including the extension entries and
  custom tables
  
  @param geoPackage
  GeoPackage
  @since 3.2.0