sm8350-common: rootdir: Remove IO read_ahead_kb tune

If we set 2048KB ra value in the beginning of the
boot process, services initialized at this time would
keep 2048KB ra value even though we adjust the ra value
to 128KB after boot completion.

This may cause memory pressure.

Bug: 174700194
Signed-off-by: Randall Huang <huangrandall@google.com>
Change-Id: I97ee0ee9511eaada011f2634afd68d68cdca4570

rootdir/etc/init.qti.kernel.rc

@@ -38,12 +38,6 @@ on init
     write /dev/cpuctl/foreground/cpu.uclamp.colocate 0
     write /dev/cpuctl/top-app/cpu.uclamp.colocate 1
 
-on post-fs
-    # Set aggressive read ahead for dm-0 and dm-1 during boot up
-    write /sys/block/dm-0/queue/read_ahead_kb 2048
-    write /sys/block/dm-1/queue/read_ahead_kb 2048
-    write /sys/block/dm-2/queue/read_ahead_kb 2048
-
 on early-boot
     # Allow subsystem (modem etc) debugging
     write /sys/kernel/boot_adsp/boot 1
@@ -76,11 +70,6 @@ service kernel-post-boot /vendor/bin/sh /vendor/bin/init.kernel.post_boot-lahain
     oneshot
 
 on property:sys.boot_completed=1
-    # Reset read ahead for dm-0, dm-1 and dm-2 to 512kb
-    write /sys/block/dm-0/queue/read_ahead_kb 512
-    write /sys/block/dm-1/queue/read_ahead_kb 512
-    write /sys/block/dm-2/queue/read_ahead_kb 512
-
     start kernel-post-boot
 
 service vendor.msm_irqbalance /vendor/bin/msm_irqbalance -f /system/vendor/etc/msm_irqbalance.conf