WORKAROUND
Here are instructions for removing the tab:
1. Ensure you have cart-dev role
2. Backup is recommended, but not necessary
3. Configurations -> Definitions
4. APM/Application Root/Custom Applications/Transactions
5. Select Associations from the drop down
6. Select Related Infrastructure Tab
7. Edit: expand and change the tags to:
* __eu-soc-details
* __applicationRootDetailsTab
(with 2 underscores at the beginning)
8. Save
RESOLUTION
Will be fixed in next release. 5.9.5