Metadata, private application data, associated files and additional
actions were removed from the catalog and pages only. The same entries on
an image or font (XMP), a Form XObject (PieceInfo), a page or annotation
(/AF with its embedded file) or a form field (/AA scripts) survived the
full rewrite, and the scan did not count them, so removing only such a
category reported nothing to remove. A walk of every object reachable from
the catalog now counts and strips these entries wherever they are, leaving
name maps such as resource dictionaries alone (their keys are names a
producer chose), and refuses a graph nested too deeply to walk in full.
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