Removed unused legal agreement and form for new amb's

Closes #821 (closed)

What does this MR do?

Here the page for confirming the non-existing legal agreement and form for new ambassadors after the quiz is removed.

How confident are you it won't break things if deployed?

(be honest!)

Links to related issues

Any relevant links (issues, documentation, slack discussions).

How to test

Steps a reviewer can take to verify that this MR does what it says it does e.g.

1. Checkout branch locally
2. Login as storemanager1
3. Open URL http://localhost:18080/?page=settings&sub=upgrade/up_bot and make ambassador quiz.

Screenshots (if applicable)

Before:

This pages is removed:

After:

Checklist

• added a test, or explain why one is not needed/possible...
• no unrelated changes
• asked someone for a code review
• set a "for:" label to indicate who will be affected by this change
• use "state:" labels to track this MR's state until it was beta tested
• added an entry to CHANGELOG.md
• add a short text that can be used in the release notes
• Once your MR has been merged, you are responsible to create a testing issue in Beta Testing Repo:
  • Consider writing a detailed description in German.
  • Describe in a few sentences, what should be tested from a user perspective.
  • Also mention different settings (e.g. different browsers, roles, ...). how this change can be tested.
  • Be aware, that also non technical people should understand.