Use eslint to find unused directives

What does this MR do?

In a lot of files we are using eslint-disable to overwrite our eslint settings. eslint has now an option --report-unused-disable-directives to find unused eslint-disable directives. We should use that option to find unnecessary disabled rules in our source code.

Example

Example of something that will throw an error now:

/* eslint-disable max-len */

//eslint-disable-next-line no-new
const foo = 5;

• Conform by the code review guidelines
  • Has been reviewed by a Frontend maintainer