Auto merge of #42991 - sfackler:unstable-rangeargument, r=alexcrichton

Revert "Stabilize RangeArgument"

This reverts commit 143206d54d.

From the discussion in #30877 it seems like this is premature.

src/libstd/collections/mod.rs

@@ -436,8 +436,6 @@ pub use self::hash_map::HashMap;
 pub use self::hash_set::HashSet;
 
 #[stable(feature = "rust1", since = "1.0.0")]
-#[rustc_deprecated(reason = "moved to std::ops", since = "1.19.0")]
-#[allow(deprecated)]
 pub use alloc::range;
 
 mod hash;