chore: remove unused files

test/stress/scripts/index.js

@@ -1,32 +0,0 @@
-const exec = require('child_process').exec
-
-/**
- * Execute simple shell command (async wrapper).
- * @param {String} cmd
- * @return {Object} { stdout: String, stderr: String }
- */
-function execCommand (cmd) {
-  return new Promise(function (resolve, reject) {
-    const proc = exec(cmd, (err, stdout, stderr) => {
-      if (err) {
-        reject(err)
-      } else {
-        resolve({ stdout, stderr })
-      }
-    })
-
-    proc.stdout.on('data', data => {
-      console.log(data)
-    })
-
-    proc.stderr.on('data', data => {
-      console.log(data)
-    })
-
-    proc.on('exit', code => {
-      console.log('child process exited with code ' + code.toString())
-    })
-  })
-}
-
-module.exports = { execCommand }