Cannot remove Site system role

I am looking at one of my removed site systems that did only act as a DP and a site system and all the directories are also present....but IIS has removed the virtual directories from it's console....and the procedure I used to remove the DP was as follows:

Removed all packages/apps manually from the DP(checked to make sure all content was removed by browsing to the content directories in the SMSPKGC$.

Removed the PXE settings(Made sure that the WDS server role was completely removed after the PXE settings on the DP)

Removed the Distribution point site system role.

Deleted the site server which removes the site system role also.

I guess the deletion of the rest of the left-over directories is a manual process if you intend keeping the server for other purposes...I am blowing away all the DP servers and starting afresh with server 2012 so the manual deletion is not applicable to me!!