Delete header_unsplash_8.jpg
Delete header_unsplash_8.jpg

remove

Former-commit-id: 7edd8ce1cf0fb7b4e15e0ebc8f60185c7dacaf58 [formerly 8e7578af2cc8b037993c27405023e128815da9e9]
Former-commit-id: 7f00aa614961cbbb8d8227e188b09cb1a5e576ed
LibraryCarpentry/librarycarpentry.github.io,LibraryCarpentry/librarycarpentry.github.io,LibraryCarpentry/librarycarpentry.github.io