pidgin/pidgin

Remove the gtk-dnd-hints stuff that should have been removed when we removed dnd from the conversation window.

2021-10-25, Gary Kramlich
e588455a446e
Remove the gtk-dnd-hints stuff that should have been removed when we removed dnd from the conversation window.

Testing Done:
Compiled.

Reviewed at https://reviews.imfreedom.org/r/1098/
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