vtimer: get rid of

Makefile.dep

cpu/native/syscalls.c

cpu/x86/include/x86_pit.h

dist/Makefile

sys/Makefile

sys/compat/Makefile

sys/compat/vtimer/Makefile

sys/compat/vtimer/vtimer_compat.c

sys/cpp11-compat/include/riot/chrono.hpp

sys/include/net/gnrc/ipv6/netif.h

sys/include/net/gnrc/rpl.h

sys/include/vtimer.h

sys/net/gnrc/network_layer/ipv6/nc/gnrc_ipv6_nc.c

sys/posix/pthread/pthread_cond.c

sys/posix/pthread/pthread_rwlock.c

tests/pthread_condition_variable/Makefile