remove PDF With Embedded Notes export format from popup for encrypted PDFs, because that's when PDFKit refuses to write it.
remove PDF With Embedded Notes export format from popup for encrypted PDFs, because that's when PDFKit refuses to write it.

git-svn-id: cb3fc60f0f557b927b8032d8a94e869b6f9f230b@5573 0fceea05-a30d-0410-8a8b-80ef821fb0a1

camillobruni/skim,camillobruni/skim,camillobruni/skim,camillobruni/skim,jasongrout/skim,jasongrout/skim