[Pidgin] #15907: Remove discontinued Yahoo! functionality

[Pidgin]

#15907: Remove discontinued Yahoo! functionality
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 Reporter:  MarkDoliner  |       Owner:  EionRobb
     Type:  task         |      Status:  new
Milestone:  3.0.0        |   Component:  unclassified
  Version:               |  Resolution:
 Keywords:               |
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Comment (by mmcco):

 Current patch:

 http://paste.ubuntu.com/11916653/

 It compiles without warnings, but I'd almost expect there to be double-
 frees with the `from` and `fed_from` strings. Those were annoying to
 merge. I'll have to actually test it at some point. Review welcome.

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Ticket URL: <https://developer.pidgin.im/ticket/15907#comment:4>
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