pidgin/pidgin

Remove now-unused PurpleXferUiOps.destroy.

2019-12-22, Elliott Sales de Andrade
d26ef8ea193f
Remove now-unused PurpleXferUiOps.destroy.

UI data is stored on GObjects and automatically destroyed, so this isn't
really needed as a UI op for *our* UIs. There will be a replacement soon
if needed by other UIs.
subdir('bonjour')
subdir('facebook')
subdir('gg')
subdir('irc')
subdir('jabber')
subdir('novell')
subdir('null')
subdir('sametime')
subdir('silc')
subdir('simple')
subdir('zephyr')