Remove cmake NAS_NETLINK option

This option is almost not referenced anywhere,  and not documented.
Remove it to avoid problems in the future.

CMakeLists.txt

@@ -629,7 +629,6 @@ include_directories ("${OPENAIR_DIR}/radio/COMMON")
 ##############################################################
 
 add_boolean_option(OAI_NW_DRIVER_TYPE_ETHERNET False "????" ON)
-add_boolean_option(NAS_NETLINK False "useless ??? Must be True to compile nasmesh driver without rtai ????" ON)
 add_boolean_option(OAI_NW_DRIVER_USE_NETLINK True "????" ON)
 
 add_boolean_option(UE_EXPANSION             False         "enable UE_EXPANSION with max 256 UE" ON)

openair2/COMMON/platform_types.h

@@ -30,13 +30,8 @@
 #ifndef __PLATFORM_TYPES_H__
 #define __PLATFORM_TYPES_H__
 
-#if !defined(NAS_NETLINK)
 #include <stdint.h>
 #include <stdbool.h>
-#else
-#include <linux/types.h>
-typedef void * intptr_t;
-#endif
 
 //-----------------------------------------------------------------------------
 // GENERIC ACCESS STRATUM TYPES