Remove Thread 1.2 source code

-Remove Thread 1.2 source code and unit tests.
-Remove flag HAVE_THREAD_v2

Author: Arto Kinnunen

source/6LoWPAN/Thread/thread_address_registration_client.c

@@ -30,23 +30,10 @@
 #ifndef THREAD_ADDRESS_REGISTRATION_CLIENT_H_
 #define THREAD_ADDRESS_REGISTRATION_CLIENT_H_
 
-
-#ifdef HAVE_THREAD_V2
-
-void thread_address_registration_init(void);
-void thread_address_registration_deinit(void);
-
-void thread_address_registration_timer_set(protocol_interface_info_entry_t *interface, uint16_t seconds);
-void thread_address_registration_timer(protocol_interface_info_entry_t *interface, uint16_t seconds);
-#else
-
 #define thread_address_registration_init(void)
 #define thread_address_registration_deinit(void)
 
 #define thread_address_registration_timer_set(interface, seconds);
 #define thread_address_registration_timer(interface, seconds);
 
-#endif
-
-
 #endif /* THREAD_ADDRESS_REGISTRATION_CLIENT_H_ */