Better remove the Firefox package from your repository

It’s better to remove the Firefox package from your repository because of the following reasons:
* It’s now an automatic package stored in my repo https://github.com/TomOne/chocolateyautomaticpackages/tree/master/Firefox.
* It can be confusing for potential contributors if they find the Firefox package in two repos.
* If I update/fix the package, the one in your repo will be outdated. That will cause a discrepancy that can lead to issues.
* If you need the package source files, you can always clone it from my repo to get the latest version.