Remove discard command tuning

Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
Change-Id: Id0fe037e9b5d1b7de3010bfe491dc4ab813be848

init.recovery.device.rc

@@ -9,10 +9,6 @@ on init
     # Enable thermal mitigation
     write /sys/devices/virtual/thermal/tz-by-name/backup-charge/mode enabled
 
-    # Block layer tuning: discard chunk size up to 128MB
-    # Otherwise, contiguous discards can be merged
-    write /sys/block/sda/queue/discard_max_bytes 134217728
-
 on early-init
     # Wait to make sure we do not try to talk too early to the display
     wait /sys/class/drm/card0