Delete documentation.md
Delete documentation.md

remove

Former-commit-id: 53faf962f3638668be2070cbe31092aa70132d12 [formerly ef1735c52d9672e0e6a840814bd5f7dd74b6105b]
Former-commit-id: 90eef2ebeb4f8dd33d65b9e2a992a4f8e901c745
LibraryCarpentry/librarycarpentry.github.io,LibraryCarpentry/librarycarpentry.github.io,LibraryCarpentry/librarycarpentry.github.io