There should be a way to delete a vendor from your system. Sometimes staff members will enter the same vendor more than once without checking and there should be a mechanism to delete these duplicates (or any vendor for that matter).
This came up in an IRC discussion at one point, and it was pointed out that you shouldn't be able to delete a vendor from which orders have been placed because that would mess up information in other places. If a vendor delete option is added it should have a method of checking to see if the vendor ID is in use anywhere else.
*** This bug has been marked as a duplicate of bug 4969 ***
Marked as invalid instead of duplicate.