refactor: Revert doctest changes

quinn-proto/src/config.rs

@@ -91,8 +91,8 @@ impl TransportConfig {
     /// idle timeout can result in permanently hung futures!
     ///
     /// ```
-    /// # use std::convert::TryInto;
-    /// # use quinn_proto::{Duration, TransportConfig, VarInt, VarIntBoundsExceeded};
+    /// # use std::{convert::TryInto, time::Duration};
+    /// # use quinn_proto::{TransportConfig, VarInt, VarIntBoundsExceeded};
     /// # fn main() -> Result<(), VarIntBoundsExceeded> {
     /// let mut config = TransportConfig::default();
     ///
@@ -1093,8 +1093,8 @@ impl From<VarIntBoundsExceeded> for ConfigError {
 /// constructed by converting directly from `VarInt`, or using `TryFrom<Duration>`.
 ///
 /// ```
-/// # use std::{convert::TryFrom};
-/// # use quinn_proto::{Duration, IdleTimeout, VarIntBoundsExceeded, VarInt};
+/// # use std::{convert::TryFrom, time::Duration};
+/// # use quinn_proto::{IdleTimeout, VarIntBoundsExceeded, VarInt};
 /// # fn main() -> Result<(), VarIntBoundsExceeded> {
 /// // A `VarInt`-encoded value in milliseconds
 /// let timeout = IdleTimeout::from(VarInt::from_u32(10_000));