sched: remove _do_fork()

Now that all callers of _do_fork() have been switched to kernel_clone() remove
the _do_fork() helper.

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Link: https://lore.kernel.org/r/20200819104655.436656-12-christian.brauner@ubuntu.com
1 file changed