in src/main/java/org/apache/sling/clam/oak/internal/NodeObservingJcrPropertyDigger.java [148:150]
protected void deleted(@NotNull final String path, @NotNull final Set<String> added, @NotNull final Set<String> deleted, @NotNull final Set<String> changed, @NotNull final Map<String, String> properties, @NotNull final CommitInfo commitInfo) {
// ignoring, deleted data is not relevant
}