Use Block Authoring Palettes
 
 
 

To delete an action from a parameter or parameter set

  1. In the Block Editor, in the Block Authoring Palettes window, right-click a parameter or parameter set. Click Properties.
  2. In the Tool Properties dialog box, under Parameter, click Actions, and then click the [...] button.
  3. In the Add Actions dialog box, under Action Object List, select an action from the list.
  4. Click Delete.
  5. (Optional) Repeat steps 3 and 4 to delete additional actions.
  6. Click OK.
  7. In the Tool Properties dialog box, click OK.