How to forcefully remove status bar icon? I had this app called Spark for working environment communication.

However, the status bar icon of this app is so ugly that I avoid look at it every time when I glimpsing over status bar.

The worst thing is there is no option for hide it in the settings. Is there anyway that I can forcefully remove it?
Try Bartender. This lets you hide (as well as re-arrange) menu bar items, as well as providing a secondary menu bar so that you can hide icons from the main bar but still have access to them on a keyboard shortcut or menu bar item.