He means created chips(Where you drag them up from) Im looking for the same thing now as well
Viewing post in Digital Logic Sim (old version) comments
The only way I have found to do this is to go into the save files and delete them manually on windows you can get there by going to your "C" drive/main drive going to "Users" going to "App data" than "LocalLow" than "Sebastian Lague" from here go to the "SaveData" folder here you should see all of your saves from here you can delete those if you want but if you just want to delete the chip than enter the save you wished for it to be deleted in from here you should see all your chips with their names delete the one you want to get rid of than go into the "WireLayout" folder and delete it there too