diff --git a/lib/common.sh b/lib/common.sh
index e9d57e3..01de6a2 100755
--- a/lib/common.sh
+++ b/lib/common.sh
@@ -20,12 +20,6 @@ panic()
     fi
 }
 
-# random()
-# {
-#     _sum=$(cksum < /proc/uptime)
-#     printf '%s' "${sum% *}"
-# }
-
 # TODO ensure correctness
 copy_file()
 (