chore: remove unused scripts argument

The 2nd argument `scripts` was introduced in hubotio/hubot@5b21536
It is meant to only load a subset of the script files that hubot scripts provide. But since there is only one file here, we can safely ignore it

index.js

@@ -2,7 +2,7 @@
 
 const path = require('path')
 
-module.exports = (robot, scripts) => {
+module.exports = (robot) => {
   const scriptsPath = path.resolve(__dirname, 'src')
   robot.loadFile(scriptsPath, 'help.js')
 }