Remove some flags from viewconf.c
##### "NBR_TABLE_MAX_NEIGHBORS": _______________ NBR_TABLE_CONF_MAX_NEIGHBORS
##### "NETSTACK_MAX_ROUTE_ENTRIES": ____________ NETSTACK_MAX_ROUTE_ENTRIES
##### "UIP_CONF_BUFFER_SIZE": __________________ UIP_CONF_BUFFER_SIZE
-##### "UIP_CONF_ROUTER": _______________________ UIP_CONF_ROUTER
-##### "NBR_TABLE_FIND_REMOVABLE": ______________ NBR_TABLE_FIND_REMOVABLE
##### "UIP_CONF_UDP": __________________________ UIP_CONF_UDP
##### "UIP_UDP_CONNS": _________________________ UIP_UDP_CONNS
##### "UIP_CONF_TCP": __________________________ UIP_CONF_TCP
##### "UIP_ND6_SEND_NA": _______________________ UIP_ND6_SEND_NA
##### "UIP_ND6_AUTOFILL_NBR_CACHE": ____________ UIP_ND6_AUTOFILL_NBR_CACHE
##### "SICSLOWPAN_CONF_FRAG": __________________ SICSLOWPAN_CONF_FRAG
-##### "SICSLOWPAN_CONF_MAC_MAX_PAYLOAD": _______ SICSLOWPAN_CONF_MAC_MAX_PAYLOAD
##### "SICSLOWPAN_COMPRESSION": ________________ SICSLOWPAN_COMPRESSION
##### "LOG_CONF_LEVEL_RPL": ____________________ LOG_CONF_LEVEL_RPL
##### "LOG_CONF_LEVEL_TCPIP": __________________ LOG_CONF_LEVEL_TCPIP
