Do I need these parts?

[MightyMouth]

I have pretty much stripped my donor and have taken a few parts I am not sure I need. I am planning on having a windscreen on my car at least sometime in the future so is the wiper motor useful or do I need another type to fit the roadster? Also the brakes are power assist so have a big round bit on them that I am hoping is not necessary, can i get rid of it and if so can I use the master cylinder on its own or do I need to buy another?