Remove background cpuset setting

Already set in init.gs201.rc.

Bug: 201260585
Test: build pass
Change-Id: Ib1343e32a4133e09029b66f8747b3b43a45548b5

conf/init.lynx.rc

@@ -99,9 +99,6 @@ on property:vendor.device.modules.ready=1
 on property:sys.boot_completed=1
     trigger override-sf-uclamp
 
-on property:vendor.powerhal.init=*
-    write /dev/cpuset/background/cpus ${persist.device_config.vendor_system_native.background_cpuset:-0-3}
-
 on override-sf-uclamp
     write /proc/vendor_sched/rt_uclamp_min 0
     write /proc/vendor_sched/sf_uclamp_min 0