With graphics drivers generally not. You could remove all of them and restart and will get default 1024x768 no QE/CI. I generally tell people when the do an install to not even select any graphics options as selecting the wrong option or multiple options can cause problems. I recommend that you back these files up to your desktop or a thumb drive as good practice. You may in the future, have to replace kexts and it is a good idea to keep them handy so that if you can't get back into OSX you can replace them in Single User Mode -s to avoid having to do a complete reinstall.

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MOBO: Z77MX-QUO-AOS CPU: Core i7 3770K GPU: MSI N760 TF 2GD5/OC Case: Modded MacPro2,1
Memory: 32GB Corsair Vengeance (CMY32GX3M4A1600C9) Wifi: Airport Extreme bcm94321MCA BIOS: HermitCrab Labs H3A.816M
Monitor: AOC Q2963Pm 29" WFHD 2560x1080 21:9
Interests: KDE on Apple Darwin, Keeping it real with the command line, Helping those that help themselves