more minor cleanup
more minor cleanup

Peilun-Li/dynet,kaishengyao/cnn,yoavg/cnn,yoavg/cnn,mitchellstern/dynet,Peilun-Li/dynet,kaishengyao/cnn,Abasyoni/dynet,kamigaito/cnn,yanweifu/cnn,dhgarrette/cnn,cherryc/dynet,Peilun-Li/dynet,cherryc/dynet,dhgarrette/cnn,dhgarrette/cnn,cherryc/dynet,mitchellstern/dynet,mrzu/cnn,Abasyoni/dynet,kamigaito/cnn,Abasyoni/dynet