fixup RTL EITFixup to not fake up original air dates

previously shown means "more then some days after the premiere"
original air date is the date of the premiere
the meaning of premiere is vague as it might be
a) the very first time a programme was shown, ever
b) the first time in this country, ever
c) the first time in free tv, ever
d) the first time on this channel, ever

mythtv/libs/libmythtv/eitfixup.cpp

@@ -1300,7 +1300,6 @@ void EITFixUp::FixRTL(DBEventEIT &event) const
         // remove '.' if it matches at the beginning of the description
         int length = tmpExpRepeat.cap(0).length() + (pos ? 0 : 1);
         event.description = event.description.remove(pos, length).trimmed();
-        event.originalairdate = event.starttime.addDays(-1).date();
     }
 
     QRegExp tmpExp1 = m_RTLSubtitle;