Allow internal_features lint

Author: bjorn3

crates/core_simd/src/lib.rs

@@ -18,6 +18,7 @@
 #![cfg_attr(feature = "generic_const_exprs", allow(incomplete_features))]
 #![warn(missing_docs, clippy::missing_inline_in_public_items)] // basically all items, really
 #![deny(unsafe_op_in_unsafe_fn, clippy::undocumented_unsafe_blocks)]
+#![allow(internal_features)]
 #![unstable(feature = "portable_simd", issue = "86656")]
 //! Portable SIMD module.