Auto merge of #49108 - SimonSapin:sip, r=TimNN

Remove or hide deprecated unstable SipHasher{13,24}

Deprecated since Rust 1.13.0.

src/libstd/lib.rs

@@ -267,7 +267,7 @@
 #![feature(fn_traits)]
 #![feature(fnbox)]
 #![feature(generic_param_attrs)]
-#![feature(hashmap_hasher)]
+#![feature(hashmap_internals)]
 #![feature(heap_api)]
 #![feature(i128)]
 #![feature(i128_type)]
@@ -298,7 +298,6 @@
 #![feature(raw)]
 #![feature(rustc_attrs)]
 #![feature(stdsimd)]
-#![feature(sip_hash_13)]
 #![feature(slice_bytes)]
 #![feature(slice_concat_ext)]
 #![feature(slice_internals)]