Removed the obsolete MAC_CONF_CHANNEL_CHECK_RATE (now replaced with...

Removed the obsolete MAC_CONF_CHANNEL_CHECK_RATE (now replaced with NETSTACK_CONF_RDC_CHANNEL_CHECK_RATE)

cpu/6502/6502def.h

@@ -68,7 +68,6 @@ typedef unsigned short uip_stats_t;
 #define UIP_ARCH_ADD32  1
 #define UIP_ARCH_CHKSUM 1
 
-#define MAC_CONF_CHANNEL_CHECK_RATE          1
 #define NETSTACK_CONF_RDC_CHANNEL_CHECK_RATE 1
 
 #define LOADER_CONF_ARCH "lib/unload.h"