Delete unsplash_brooklyn-bridge-thumb.jpg
Delete unsplash_brooklyn-bridge-thumb.jpg

Former-commit-id: 810cf68951cf79fe97fbecc980dfe3d69c9fada8 [formerly 21434a775c6226140af7b38d3505cd80df9462d9]
Former-commit-id: d9d38c21f29fbc6237679f8fc6fad5ecda6caca9
LibraryCarpentry/librarycarpentry.github.io,LibraryCarpentry/librarycarpentry.github.io,LibraryCarpentry/librarycarpentry.github.io