Remove Sunflower Sound Source Drive

I installed Sunflower sound drive long time ago. From System Preferences or Sound source list, 2 soundflower items are displayed. Since this sound source is not working well in Mac OS Catalina, and I have never used it as audio output, I need to remove them.

I found that sound items were installed as extensions to Mac. I don't have original package with uninstaller, hence, I have to manually remove them. Here are steps I found:

1. Open Terminal
2. Change folder to /Library/Extensions
   
   

   cd /Library/Extensions

   
   
3. Check soundflower is there with command
   
   

   ls Soundflower.kext

   
   
4. Remove it with the command
   
   

   sudo rm -rf Soundflower.kext

   
   
5. Reboot

After reboot, soundflower items are no longer in audio output list.

One more interesting I found that in the folder of /Library/StagedExtensions/Library/Extensions/, I can still see Soundflower.kext file there, but I cannot remove it with above command. Anyway, the removal seems working fine in terms audio output list, I don't bother to figure out how to remove it from the second place.