Here is the instruction to hide the clock from the menu bar.
Click on the Settings menu > System Settings. Go to System > Time & Date Click on the Clock tab Uncheck Show a clock in the menu bar.
I wasn't sure which version of Ubuntu this article written for. But it was not for Ubuntu 20.04 as there is no option to uncheck
Show a clock in the menu bar as shown in the screenshot/article above.
I just want to have top menu bar without the clock in the middle. That's it. Thanks