[dataset] remove unused method declaration in DatasetLocal (#2495)
[dataset] remove unused method declaration in DatasetLocal (#2495)


bukepo/openthread,chshu/openthread,srickardti/openthread,librasungirl/openthread,pvanhorn/openthread,erja-gp/openthread,gandreello/openthread,georgecpr/openthread,georgecpr/openthread,chshu/openthread,chshu/openthread,lanyuwen/openthread,erja-gp/openthread,lanyuwen/openthread,bukepo/openthread,mszczodrak/openthread,turon/openthread,gandreello/openthread,LeZhang2016/openthread,abtink/openthread,bukepo/openthread,georgecpr/openthread,pvanhorn/openthread,jwhui/openthread,mszczodrak/openthread,erja-gp/openthread,librasungirl/openthread,georgecpr/openthread,georgecpr/openthread,pvanhorn/openthread,erja-gp/openthread,jwhui/openthread,LeZhang2016/openthread,bukepo/openthread,openthread/openthread,turon/openthread,chshu/openthread,gandreello/openthread,lanyuwen/openthread,LeZhang2016/openthread,srickardti/openthread,turon/openthread,gandreello/openthread,lanyuwen/openthread,pvanhorn/openthread,lanyuwen/openthread,chshu/openthread,srickardti/openthread,erja-gp/openthread,mszczodrak/openthread,mszczodrak/openthread,turon/openthread,erja-gp/openthread,gandreello/openthread,pvanhorn/openthread,lanyuwen/openthread,librasungirl/openthread,LeZhang2016/openthread,jwhui/openthread,openthread/openthread,mszczodrak/openthread,abtink/openthread,LeZhang2016/openthread,srickardti/openthread,abtink/openthread,abtink/openthread,librasungirl/openthread,openthread/openthread,chshu/openthread,pvanhorn/openthread,georgecpr/openthread,mszczodrak/openthread,openthread/openthread,gandreello/openthread,jwhui/openthread,LeZhang2016/openthread