remove tasksmax, people on newer kernels can add it themselves
remove tasksmax, people on newer kernels can add it themselves

Signed-off-by: Jessica Frazelle <acidburn@docker.com>
(cherry picked from commit 624125082414d5ba4a987657a44a8506920da611)

From PR #20167

swasd/baleno,swasd/baleno,swasd/baleno