pidgin/pidgin

Remove the oscar protocol
release-2.x.y
2021-04-08, Gary Kramlich
d12f1daf83ff
Remove the oscar protocol

ICQ moved to a new protocol in 2017 and AIM was shutdown in 2017 as well.
Therefore, this code has been doing absolutely nothing for us.

Testing Done:
Compiled and ran on linux, need to test windows yet.

Reviewed at https://reviews.imfreedom.org/r/598/
<?xml version="1.0" encoding="UTF-8" ?>
<stream:stream xmlns="jabber:client" xmlns:stream="http://etherx.jabber.org/streams" >
<message to="yo@chloe" type="chat"><body>hola</body><html xmlns="html://www.w3.org/1999/xhtml"><body ichatballoncolor="#111111" ichattextcolor="#000000"><font face="Courier" ABSZ="3">hola</font></body></html><x xmlns="jabber:x:event"><composing /></x></message>
</stream:stream>