chore: removed unused variable

Author: Hextar

examples/auth-management.js

@@ -24,9 +24,6 @@ ImmudbClient({
   address: `${IMMUDB_HOST}:${IMMUDB_PORT}`,
 }, main)
 
-const rand = '' + Math.floor(Math.random()
-  * Math.floor(100000))
- 
 async function main(err, cl) {
   if (err) {
     return console.log(err)