Delete description to herokuapp

[geeknees]

Description

The description was changed because the herokuapp was not running and was running on a different domain.

ref. #1954

Also, the test was removed as the file was commented out and considered unnecessary. There was also a description of herokuapp here.

ref. #1804

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works

Manual review steps

1. Step 1
2. Step 2

Manual reviewer: please leave a comment with output from the test if that's the case.

[codeclimate]

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[adrianthedev]

Thanks @geeknees!