Restore default readahead window on dm-verity device

Bug: 27849539

Change-Id: Ifd5537a5bd526420404ecfa9571db04346c6b69b
diff --git a/init.bullhead.rc b/init.bullhead.rc
index 45a8861..e737f5a 100644
--- a/init.bullhead.rc
+++ b/init.bullhead.rc
@@ -88,9 +88,6 @@
     write /sys/module/pil_msa/parameters/modem_auth_timeout_ms ${persist.sys.modem_auth_timeout}
     write /sys/module/peripheral_loader/parameters/proxy_timeout_ms ${persist.sys.pil_proxy_timeout}
 
-    # Adjust parameters for dm-verity device
-    write /sys/block/dm-0/queue/read_ahead_kb 2048
-
     # Update dm-verity state and set partition.*.verified properties
     verity_update_state