you would remove https://dxr.mozilla.org/mozilla-central/source/security/nss/lib/pk11wrap/secpkcs5.h#43-57 and https://dxr.mozilla.org/mozilla-central/source/security/nss/lib/pk11wrap/pk11pbe.c#963-1082 so you could compile - I would hope after 12 years, there are no applications using that code.
Bug 390374 Comment 2 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
you would remove https://dxr.mozilla.org/mozilla-central/source/security/nss/lib/pk11wrap/secpkcs5.h#43-57 and https://dxr.mozilla.org/mozilla-central/source/security/nss/lib/pk11wrap/pk11pbe.c#963-1082 to remove the dead code - I would hope after 12 years, there are no applications using that code.