Schemes
Schemes lists all the schemes and their handlers that are registered via Launch Services on your system.
Unregistering an entry removes that app from launch services. You could do this manually by using lsregister
. Example:
/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister -u /path/to/your.app