Small style fixes + Remove dead code

[antja0]

No description provided.

[antja0]

Hi!
I just wanted to help a bit in the spirit of HacktoberFest!
I hope it's ok 😃

I also leave some codebase improvement suggestions here in case you want to create a ticket for someone else / do it yourself:

1. Replace most of var with let and const for some memory optimization (on the downside might not work on very old browsers)
2. Place 'use strict'; on top of the file. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Strict_mode