uninstall chromium and O

What is O???

• 1. Quit the Chromium browser and abort all processes related to it or those active in the background.
• 2. Access Finder → go to Applications Folder → remove Chromium (choose the ‘Move to the Trash’ option in the drop-down menu).
• 3. Access Finder → go to Menu Bar and click ‘Go.’
• 4. Choose ‘Go to Folder’ and type in ~/Library in the field.
• 5. Click ‘Go’ button to access the Library folder storing important application data, personal settings, and support files.
• 6. Chromium browser service files can be located in the following subfolders:
  • • ~Library/Application Support/Chromium
  • • ~Library/Caches/Chromium
  • • ~Library/Preferences/org.chromium.Chromium.plist
  • • ~Library/LaunchAgents 
  • • ~Library/LaunchDaemons
  • • ~Library/PreferencePanes
  • • ~Library/StartupItems

So, it's not in any of those locations, just in LaunchPad?

How to remove an icon from launchpad that does not appear in the Finder?

https://apple.stackexchange.com/questions/144756/how-to-remove-an-icon-from-launchpad-that-does-not-appear-in-the-finder