Delete 2015-02-10-header-with-text.md
Delete 2015-02-10-header-with-text.md

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Former-commit-id: cb42eaab3e69270324fde4f853dbfc39977ab38d
LibraryCarpentry/librarycarpentry.github.io,LibraryCarpentry/librarycarpentry.github.io,LibraryCarpentry/librarycarpentry.github.io