After you create a Decision Table, you can remove conditions in a Decision Table.
Note
You cannot remove all conditions. Decision tables must have at least one condition.
In the Project Explorer view, expand the rules composer DC node, the Rules Modeling node and double-click the ruleset node.
In the Outline view, choose a Decision Table node.
In the Decision Table Editor, choose the Condition button.
In the menu that appears, choose Remove Conditions.
In the dialog box that appears, select the conditions that you want to remove and choose OK.
Save the changes.