I guess you're talking about product license information for your core server? (licensed products, number of nodes, etc.?)
To reset this, just start the activation wizard (Start > ... > LANDesk > Core Server Activation) and re-activate your Core Server with your own credentials.
This will overwrite your reseller's license data with your own license file on the activation server.
Tom - We want to remove license data related to 3rd party software licenses that were procured through our reseller and then imported in to the LANDesk database. We do NOT want to license data related to LANDesk itself. Does that make sense? Sorry if my question wasn't clear. Can you help? - Bob