[mle-tlvs] remove unused type/constant definitions (#5082)
[mle-tlvs] remove unused type/constant definitions (#5082)


abtink/openthread,abtink/openthread,chshu/openthread,librasungirl/openthread,bukepo/openthread,lanyuwen/openthread,jwhui/openthread,srickardti/openthread,openthread/openthread,abtink/openthread,openthread/openthread,librasungirl/openthread,librasungirl/openthread,jwhui/openthread,chshu/openthread,lanyuwen/openthread,srickardti/openthread,bukepo/openthread,jwhui/openthread,lanyuwen/openthread,chshu/openthread,openthread/openthread,librasungirl/openthread,lanyuwen/openthread,chshu/openthread,srickardti/openthread,chshu/openthread,abtink/openthread,bukepo/openthread,lanyuwen/openthread,chshu/openthread,openthread/openthread,jwhui/openthread,bukepo/openthread,srickardti/openthread,lanyuwen/openthread