Clean goal deletes charts subfolders whole content

[Rayzen]

When executing clean goal all contents under charts folder is deleted, including local subcharts

@Override
public void execute() throws MojoExecutionException {

	if (skip || skipClean) {
		getLog().info("Skip clean");
		return;
	}

	for (Path chartDirectory : getChartDirectories()) {
		getLog().info("Cleanups chart " + chartDirectory + "...");
		Path chartsPath = chartDirectory.resolve("charts");
		if (Files.exists(chartsPath)) {
			try {
				try (Stream<Path> paths = Files.walk(chartsPath)) {
					paths.sorted(Comparator.reverseOrder()).forEach(this::delete);
				}
				delete(chartDirectory.resolve("Chart.lock"));
			} catch (IOException e) {
				throw new MojoExecutionException("Failed to cleanups chart " + chartDirectory, e);
			}
		}
	}
}

I think the right behaviour should be deleteing only .lock files (Chart.lock and requirements.lock) and .tgz files only.