pidgin/pidgin

Remove some references to the keyring api that were missed

2021-04-30, Gary Kramlich
73e647dfbb68
Remove some references to the keyring api that were missed

Testing Done:
Ran `ninja pidgin-pot libpurple-doc` and verified no errors

Reviewed at https://reviews.imfreedom.org/r/634/
libpurple/data/purple-url-handler.desktop.in
libpurple/protocols/null/nullprpl.c
pidgin/data/im.pidgin.Pidgin.desktop.in
sub/libpurple/data/purple-url-handler.desktop.in
sub/libpurple/protocols/null/nullprpl.c
sub/pidgin/data/im.pidgin.Pidgin.desktop.in