From your grub menu, that is the menu you see when you turn your computer on.
1. Press "e" for edit
2. Choose the line with the kernel you want to boot
3. Press "e" again for edit.
4. Add to the end of the line "init 2"
5. Press "b" to boot the kernel.
6. Login on your computer.
7. Write "sudo rm /etc/X11/xorg.conf"
8. Write "sudo reboot"
By doing that you remove the xorg.conf file you have there now.
I am not 100 % sure did it exactly like I wrote since I wrote it from my
memory, but might have a clue what you need to do and and what you need to do
differently.
