remove time::Duration from prelude

Author: ChrisDenton

library/core/src/prelude/common.rs

@@ -94,10 +94,6 @@ pub use crate::sync::atomic::{
     AtomicU32, AtomicU64, AtomicU8, AtomicUsize,
 };
 
-#[stable(feature = "core_prelude_extra", since = "CURRENT_RUSTC_VERSION")]
-#[doc(no_inline)]
-pub use crate::time::Duration;
-
 #[stable(feature = "core_prelude_extra", since = "CURRENT_RUSTC_VERSION")]
 #[doc(no_inline)]
 pub use crate::ops::ControlFlow;