How can I remove an auto list rule from all selected templates

Follow these steps:

Select one/more templates on which you wish to remove the rule. OR you can simply select ALL the templates.
Right click inside the Grid to reveal options
Click on the option "Remove Auto List Rule..."
You will be asked to Select a rule from all the rule(s) you had created thus far.
You will see a warning dialog pop up, make a choice to proceed with removal or cancel the operation.