gpsr: fixed bug in grammar

psGrammar/tasks/gpsr/gpsr_Narrow.jsgf

@@ -8,8 +8,6 @@ public <sentence> = ([tobi | biron] <VP1> [([and|then] <VP2>)] [([and|then] <VP3
 <VP2> 		= (<VP_tritrans> | <VP_bitrans> | <VP_trans> );
 <VP3> 		= (<VP_tritrans> | <VP_bitrans> | <VP_trans> );
 
-<VP_repeat> 	= (and <VP> [<VP_repeat>]) | (then <VP> [<VP_repeat>]) | (<VP> [<VP_repeat>]);
-
 <VP_trans> = <findObj> | <findPrs> | <followPrs> | <gotoLoc> | <speakInfo> | <answer>;
 <VP_bitrans> = <deliverObjToLoc> | <deliverObjToPrs> | <findObjInLoc> | <findPrsInLoc> | <followPrsToLoc> | <takeObjFromLoc>;
 <VP_tritrans> = <deliverObjToPrsInLoc>;