Revert "Remove zerodisk from mcp offline image build"

This reverts commit a5888ad74de1c1f5aeeccb8bf36b81167322b119.

Reason for revert: missed image configs

Related-bug: PROD-35231
Change-Id: Ica8adb74a67fa36344d73ee718f32b325005d3d5
diff --git a/day01-image/scripts/flush_disk.sh b/day01-image/scripts/flush_disk.sh
deleted file mode 100644
index 5d57919..0000000
--- a/day01-image/scripts/flush_disk.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-set -x
-
-echo 3 > /proc/sys/vm/drop_caches
-sync
diff --git a/day01-image/template.json b/day01-image/template.json
index 7bb8d6c..a862869 100644
--- a/day01-image/template.json
+++ b/day01-image/template.json
@@ -93,7 +93,7 @@
         "scripts/cleanup_salt.sh",
         "scripts/cleanup_day01.sh",
         "scripts/info.sh",
-        "scripts/flush_disk.sh"
+        "scripts/zerodisk.sh"
       ]
     },
     {