Disabled header

Hello,
 
Thank you for reaching out to us.
 
The mentioned area will be hidden in case both filter dropdown and measures dropdown are hidden.
It can be achieved using showMeasures and showFilter properties of the chart object. In its turn, the chart object is a property of the Options Object.
Please set values of the mentioned properties to false, as demonstrated below:

options: {
  ...
  chart: {
    showMeasures: false,
    showFilter: false
  }
}

 
You are welcome to check out the example we have prepared in order to demonstrate the described approach.
 
We hope it works for your case.
 
Best regards,
Illia