Well, the box isn't labled, it's under the Status tab and it has tasks in it, so, yes I suppose that it is a task list. I tried your suggestion. The file is still there in the task list, status=Waiting, Started/Scheduled=Disabled.
If you replace all the qvw's you deleted that were associated with the tasks in the task list, you should then be able to go into QEMC>Documents>SourceDocuments>TaskName and delete the task by clicking on the red X. You will not be able to do this if the file related to the task is no longer there, so make sure you recreate one with the exact same name in your source folder. Once the tasks are deleted, you can then delete the qvw's as Erich has said.