Refactor MTE-2773 Remove UserAgentTest

[clarmso]

📜 Tickets

Jira ticket

💡 Description

UserAgentTest has been disabled. We don't know what it does. It can be removed safetely.

📝 Checklist

You have to check all boxes before merging

• Filled in the above information (tickets numbers and description of your work)
• Updated the PR name to follow our PR naming guidelines
• Wrote unit tests and/or ensured the tests suite is passing
• When working on UI, I checked and implemented accessibility (minimum Dynamic Text and VoiceOver)
• If needed, I updated documentation / comments for complex code and public methods
• If needed, added a backport comment (example @Mergifyio backport release/v120)

[mergify]

This pull request has conflicts when rebasing. Could you fix it @clarmso? 🙏