Can you remove the form this way?
1.) On the left-hand side of your screen, click Tax Tools
2.) Click Tools
3.) On the window that pops up, click Delete a Form
4.) Scroll down to the Schedule B - 1099 INT form you wish to remove and click Delete.
When I tested this, it completely removed the entry from all sources. If this doesn't correct the issue, please post additional details below so that we can continue to troubleshoot.