Remove AltTester Unreal SDK documentation from repository

[andreion1ca]

Describe the feature/enhancement
Remove the AltTester Unreal SDK documentation from the AltTester-Unity-SDK repository and modify the new URL for the AltTester Unreal SDK documentation.

What is the reason you need this feature?
The AltTester Unreal SDK documentation was moved to the alttester-unreal-sdk repository, therefore we should remove it from this repository.

[iulianatodoran]

Checks on the staging documentation

• ✅ in the Unity SDK repository the Unreal documentation is completely removed
• ❌ the URL for the Unreal documentation is updated as expected in all necessary locations

  • the link from the left navigation menu does not redirect to the Unreal documentation

    

Conclusion

Considering this, I will re-open the ticket.

[iulianatodoran]

✅ Checked that the issue mentioned in the above comment is fixed: the link for the Unreal documentation from the left navigation redirects to the expected location

Considering this, I will move the ticket to Done.