Remove row with null cells in visual

Hello everyone!

I have a matrix visual (shown below) that I have some measures applied to it. There are some empty/null cells that exist though. Is there a way to remove a row with an empty cell in the visual? Thank you!

Here are the measures used:

Before Dialog Steps = 
    var __BeforeDialogSteps = 
        SELECTCOLUMNS(
            FILTER(
                ST03N;
                [Date Time] = [Before Date]
            );
            "__BeforeDIA"; [Number of Dialog Steps]
        )
return
    __BeforeDialogSteps

After Dialog Steps = 
    var __AfterDialogSteps = 
        SELECTCOLUMNS(
            FILTER(
                ST03N;
                [Date Time] = [After Date]
            );
            "__AfterDIA"; [Number of Dialog Steps]
        )
return
    __AfterDialogSteps

Percentage Difference Between Checkpoints = 
    var __Difference = [After Dialog Steps] - [Before Dialog Steps]
return
    DIVIDE(__Difference; [Before Dialog Steps])