Removing #if 0'd loggers

[Michael McConville]

On Tue, Jul 21, 2015 at 11:50:52AM -0400, Michael McConville wrote:
> The XML, Fire, and Messenger Plus! loggers are all #if 0'd. It seems
> that some or all of them have never actually been enabled. Any
> objections to removing them?
> 
> 	https://hg.pidgin.im/soc/2015/mmcc/main/rev/9f94cdfa8db2
> 
> 	https://hg.pidgin.im/soc/2015/mmcc/main/rev/790f93bd9ced

Committed for lack of complaint:

	https://hg.pidgin.im/pidgin/main/rev/72893d196f1a

hg blame suggested that none had ever been enabled in Pidgin.