Auto merge of #5190 - mbrubeck:doc, r=alexcrichton
authorbors <bors@rust-lang.org>
Thu, 15 Mar 2018 22:35:24 +0000 (22:35 +0000)
committerbors <bors@rust-lang.org>
Thu, 15 Mar 2018 22:35:24 +0000 (22:35 +0000)
commit182226ec49d9cd4ce4f041ee7a10dcaa442e704a
tree0adcd56cc21dcaf1c7c61807e6bba08528fc9b4c
parent6bdb5c5a46cd7bfaae0fe133c33f2b1449d03e67
parent2c00108de9e611599ae706435a7857e0fa9f315f
Auto merge of #5190 - mbrubeck:doc, r=alexcrichton

Remove old note about pre-1.21 versions

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