As title.Use the same way to decide exhaust fan.
Removes end print exhaust fan control.
Signed-off-by: xun.zhang <xun.zhang@bambulab.com>
Change-Id: Ib848b04361dc1214eabe2819a6d120d9e0646689
(cherry picked from commit 02ef3a05141710172b1ec2cc45c1e3f9908c82a3)