std: Stabilize APIs for the 1.8 release

This commit is the result of the FCPs ending for the 1.8 release cycle for both
the libs and the lang suteams. The full list of changes are:

Stabilized

* `braced_empty_structs`
* `augmented_assignments`
* `str::encode_utf16` - renamed from `utf16_units`
* `str::EncodeUtf16` - renamed from `Utf16Units`
* `Ref::map`
* `RefMut::map`
* `ptr::drop_in_place`
* `time::Instant`
* `time::SystemTime`
* `{Instant,SystemTime}::now`
* `{Instant,SystemTime}::duration_since` - renamed from `duration_from_earlier`
* `{Instant,SystemTime}::elapsed`
* Various `Add`/`Sub` impls for `Time` and `SystemTime`
* `SystemTimeError`
* `SystemTimeError::duration`
* Various impls for `SystemTimeError`
* `UNIX_EPOCH`
* `ops::{Add,Sub,Mul,Div,Rem,BitAnd,BitOr,BitXor,Shl,Shr}Assign`

Deprecated

* Scoped TLS (the `scoped_thread_local!` macro)
* `Ref::filter_map`
* `RefMut::filter_map`
* `RwLockReadGuard::map`
* `RwLockWriteGuard::map`
* `Condvar::wait_timeout_with`

Closes #27714
Closes #27715
Closes #27746
Closes #27748
Closes #27908
Closes #29866

1 files changed, 0 insertions, 3 deletions

diff --git a/src/test/compile-fail/empty-struct-unit-pat.rs b/src/test/compile-fail/empty-struct-unit-pat.rs
index d399e73be35..a75290c9405 100644
--- a/src/test/compile-fail/empty-struct-unit-pat.rs
+++ b/src/test/compile-fail/empty-struct-unit-pat.rs
@@ -12,9 +12,6 @@
 
 // aux-build:empty-struct.rs
 
-// remove prior feature after warning cycle and promoting warnings to errors
-#![feature(braced_empty_structs)]
-
 extern crate empty_struct;
 use empty_struct::*;