Removed unnecessary program url pattern settings.
Removed unnecessary program url pattern settings.

And used _clear method to clear internal states instead.

--HG--
extra : rebase_source : 4b09d9cd4b2f4b02c18b9b4c185396e00085f4b3

rhyolight/nupic.son,rhyolight/nupic.son,rhyolight/nupic.son