If you're referring to the Menu Bar at the top of your screen, try holding the Command key and dragging them off.I have icons on my taskbar for apps that I no longer have on my iMac. Any suggestions as to how I can remove the icons?
In most cases, app removal software doesn't do a thorough job of finding and removing files/folders related to deleted apps. For more information, read this and this. If you just want to delete the app, drag the .app file to the trash. No other software needed. If you want to completely remove all associated files/folders, no removal apps will do the job.I have removed the apps using AppZapper.