pidgin/pidgin

Remove the existing logging code from Finch now that the History API has landed

We still need to finish integrating the History API into finch, but moving this
out of the way first will make that easier.

Testing Done:
Compiled

Reviewed at https://reviews.imfreedom.org/r/1037/
if ENABLE_DOC
subdir('reference')
endif
if ENABLE_GTK
pidgin_man = configure_file(
input : 'pidgin3.1.in',
output : 'pidgin3.1',
configuration : man_conf,
install : true,
install_dir : get_option('mandir') / 'man1')
endif
if enable_consoleui
finch_man = configure_file(
input : 'finch3.1.in',
output : 'finch3.1',
configuration : man_conf,
install : true,
install_dir : get_option('mandir') / 'man1')
endif