Description of problem:
User can not remove his attachment in TCMS.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Upload a attachment for a test case
2. Go to attachment tap to try to remove a attachment, e.g: test.jar
There is no available action to remove attachment for user.
Allow user to add attachment, also should allow user to remove his attachemnt.
*** This bug has been marked as a duplicate of bug 584721 ***