Move is_whitelisted to the common script so that all users get the previous fix

src/scripts/package_script_whitelist.sh

Index: src/scripts/package_script_whitelist.sh
diff --git a/src/scripts/package_script_whitelist.sh b/src/scripts/package_script_whitelist.sh
index 2d23fe0755d18c0b5d2a24f015789e52dcaf1173..30b6f7aa610678c36fb273b51c78a508eebe1efa 100755
--- a/src/scripts/package_script_whitelist.sh
+++ b/src/scripts/package_script_whitelist.sh
@@ -47,19 +47,6 @@ following commands:
 FLAGS "$@" || exit 1
 eval set -- "${FLAGS_ARGV}"
 
-# Returns true if the input file is whitelisted.
-#
-# $1 - The file to check
-is_whitelisted() {
-  local file=$1
-  local whitelist="$FLAGS_whitelist"
-  test -f "$whitelist" || return
-
-  local checksum=$(md5sum "$file" | awk '{ print $1 }')
-  local count=$(grep -c "$checksum" "${whitelist}" || /bin/true)
-  test $count -ne 0
-}
-
 # Adds a the file at the given path to the whitelist.
 #
 # $1 - Path to file to add to whitelist.