To hide this feature in total is actually not possible.

But you can turn off the automatic contract scan, if you do not want, that your transactions are scanned about new contracts.

Therefore please ignore all new contracts (or add them to your Fix Costs). When the list of new contracts is empty, you can turn off the automatic scan. 

• iOS: click on 'Turn Off Automatic Scanning' to deactivate this feature. You can activate the feature at any time again.
• macOS: remove the checkmark from 'Automatic Scan' entferne den Haken bei 'Automatisch scannen'. You can activate the feature at any time again by clicking on 'Search for new contracts'