This command has moved
PDF Summary Report is no longer a separate menu command. Its HTML report is now produced by Document Statistics, under Plug-Ins > Utilities, using its Save as HTML button.
The two commands reported on the same document and duplicated each other. Folding them together also made the saved report more complete: alongside the page count, timestamp and annotation breakdown it always carried, it now reports words, bookmarks, links, form fields, PDF version, file size and page size.
Tip
The keyboard shortcut is unchanged — Ctrl+Shift+S now opens Document Statistics.