Remove debug print for t.RetweetedStatus(it may be <nil>)

with debug print:
"
Go News (@golang_news) at Sun Jun 29 23:18:36 +0000 2014:
RT status <nil>
A comparison of Go to Rust and Haskell [xpost /r/rust] http://t.co/702XYt2oMW #reddit
"
as above, t.RetweetedStatus is nil