Deleting a .kext file.

Hi all,

So I have gone to /Library/StagedExtensions/Library/Extensions in order to delete some audio drivers that honestly is annoying me since I have to click multiple times to actually make the in-built MacBook Air microphone to show up in the "sound" area of system preferences. In /Library/StagedExtensions/Library/Extensions, I found the problems - IShowU Audio Capture.kext and LeawoAudioDevice.kext. trying to delete them results in a "IShowU Audio Capture.kext" can't be modified or deleted as it is required by MacOS. I am sure that it is NOT required, but sudo rm -rf just says that the operation is not permitted error. Both these errors are in the screenshots attached. Please help. I really don't want to reset my new MacBook Air.