Rollup merge of rust-lang#147732 - h3nryc0ding:master, r=chenyukang

remove duplicate inline macro

Author: matthiaskrgr

library/alloc/src/sync.rs

@@ -886,7 +886,6 @@ impl<T, A: Allocator> Arc<T, A> {
     /// let five = Arc::try_new_in(5, System)?;
     /// # Ok::<(), std::alloc::AllocError>(())
     /// ```
-    #[inline]
     #[unstable(feature = "allocator_api", issue = "32838")]
     #[inline]
     pub fn try_new_in(data: T, alloc: A) -> Result<Arc<T, A>, AllocError> {