pidgin/pidgin

Remove a reference to a doc file that was in a draft review request

2021-05-06, Gary Kramlich
648527ab9ae3
Remove a reference to a doc file that was in a draft review request

Testing Done:
Ran `ninja pidgin-doc`

Reviewed at https://reviews.imfreedom.org/r/643/
protocols_doc = []
if DYNAMIC_FACEBOOK
subdir('facebook')
protocols_doc += facebook_doc
endif