Merge #58: Remove doc_auto_cfg

cdc6faf Remove doc_auto_cfg (Nick Johnson)

Pull request description:

  Removed in nightly, see rust-bitcoin/rust-bitcoin#5084

ACKs for top commit:
  tcharding:
    ACK cdc6faf

Tree-SHA512: 98dcf0e2d4b57f2ccb2aa40cfe53773dfc6cd502f141f1b31b8be5068ad4d376c7b588fe8a5053a0b93324eec493b0e305d36d7e3799a866b9e8fab48e2acfd1

Author: tcharding

src/lib.rs

@@ -9,8 +9,6 @@
 //! [BIP-370]: <https://github.com/bitcoin/bips/blob/master/bip-0370.mediawiki>
 
 #![no_std]
-// Experimental features we need.
-#![cfg_attr(docsrs, feature(doc_auto_cfg))]
 // Coding conventions
 #![warn(missing_docs)]