redundant extern crate (rust 2018)
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@@ -9,8 +9,6 @@
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//! }
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//! }
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//! ```
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//! ```
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extern crate hex;
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use std::iter;
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use std::iter;
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use std::net::{SocketAddr, ToSocketAddrs, UdpSocket};
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use std::net::{SocketAddr, ToSocketAddrs, UdpSocket};
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