pidgin/pidgin

Remove the IRC RFC as we don't really need a copy of it in our source code.

Testing Done:
None, the file isn't part of the build.

Reviewed at https://reviews.imfreedom.org/r/206/
REVIEWBOARD_URL = "https://reviews.imfreedom.org/"
REPOSITORY = "pidgin/pidgin"
REPOSITORY_TYPE = "mercurial"
BRANCH = "default"
LAND_DEST_BRANCH = "default"
LAND_PUSH = False