To delete any event and event condition you have set, select the event and click the  button on the toolbar.
 button on the toolbar. 
Note that it is not possible to delete the built-in events (Unconditional Trace event and Run-Break Timer event).
| For the Break event of execution type, it is possible to delete the set event to click the event mark displayed in the Editor panel/Disassemble panel. | 
 button (note, however, that it is not possible to delete the built-in events).
 button (note, however, that it is not possible to delete the built-in events).