Remove not needed libraries from repository

[vanvught]

• [ ] lib-midi
• [ ] lib-oscserver
• [ ] lib-pca9685
• [ ] lib-pca9685dmx
• [ ] lib-showfile
• [ ] lib-ws28xx
• [ ] lib-ws28xxdmx

This would need a change in the build process for lib-configstore

@parabolic333