pidgin/pidgin

Remove the old conversations API

2 months ago, Gary Kramlich
7c0d5898fa96
Remove the old conversations API

Everything has been migrated to PurpleConversationManager and only plugins that
needt to be ported were using the signals.

Testing Done:
Ran with the turtles.

Reviewed at https://reviews.imfreedom.org/r/3130/
<?xml version="1.0" encoding="UTF-8"?>
<gresources>
<gresource prefix="/im/pidgin/libpurple/">
<file compressed="true">sqlitehistoryadapter/01-schema.sql</file>
</gresource>
</gresources>