callbacks.py: Remove duplicated getRealIrc() definition
callbacks.py: Remove duplicated getRealIrc() definition

NestedCommandsIrcProxy inherits the method from ReplyIrcProxy.
(Also fix some typos.)

Signed-off-by: James Vega <91ae71a1168cea0b65ac9975da69d5a7753116be@users.sourceforge.net>

haxwithaxe/supybot,jeffmahoney/supybot,mazaclub/mazabot-core,ProgVal/Limnoria-test,Ban3/Limnoria,buildbot/supybot,prashantpawar/supybot-rothbot,mazaclub/mazabot-core,raboof/supybot,ProgVal/Limnoria-test,frumiousbandersnatch/supybot-code,Ban3/Limnoria