Remove unused Protractor end-to-end tests

Description

The Admin UI comes with quite a number of Protractor end-to-end tests. While those have been part of our codebase for years, they were never actually executed or adapted to changes to the Admin UI.

As nobody seems to care, let us remove them from our codebase.

Fixed and reviewed
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Assignee

Sven Stauber

Reporter

Sven Stauber