[Pidgin] #15906: Remove Yahoo! Japan

[Pidgin]

#15906: Remove Yahoo! Japan
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 Reporter:  MarkDoliner  |       Owner:  sulabh.dev
     Type:  task         |      Status:  new
Milestone:  3.0.0        |   Component:  Yahoo!/Yahoo! JAPAN
  Version:               |  Resolution:
 Keywords:               |
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Comment (by mmcco):

 Also, for what it's worth, the servers seem to have actually been nixed.
 Attempted connections fail immediately with an "empty response" error.
 Additionally, many of the secondary domains (the `YAHOOJP_*` defines in
 `libpurple/protocols/yahoo/ymsg.h`) don't even resolve anymore.

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Ticket URL: <https://developer.pidgin.im/ticket/15906#comment:6>
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