Remove unused links

README.md

@@ -60,9 +60,6 @@ Please refer to the specific patch and source in question for further informatio
 License texts can be obtained at https://github.com/torvalds/linux/tree/master/LICENSES.
 
 [wiki-setup]: https://github.com/linux-surface/linux-surface/wiki/Installation-and-Setup
-[wiki-setup-post]: https://github.com/linux-surface/linux-surface/wiki/Installation-and-Setup#post-installation
-[wiki-repos]: https://github.com/linux-surface/linux-surface/wiki/Package-Repositories
-[wiki-secure-boot]: https://github.com/linux-surface/linux-surface/wiki/Secure-Boot
 [wiki-compiling]: https://github.com/linux-surface/linux-surface/wiki/Compiling-the-Kernel-from-Source
 
 [gitter]: https://gitter.im/linux-surface