init: main: commented out ftrace_init() because I don't use ftrace for released kernels, only for my own debugging. Should save few ms during boot.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>

Conflicts:

	init/main.c

Signed-off-by: Seongmin Park <r_data@naver.com>
Signed-off-by: klozz <xxx.reptar.rawrr.xxx@gmail.com>