Remove deny for intra doc link failures from library code, it's no longer necessary

Author: Manishearth

library/alloc/src/lib.rs

@@ -69,7 +69,6 @@
 #![warn(deprecated_in_future)]
 #![warn(missing_docs)]
 #![warn(missing_debug_implementations)]
-#![deny(intra_doc_resolution_failures)] // rustdoc is run without -D warnings
 #![allow(explicit_outlives_requirements)]
 #![allow(incomplete_features)]
 #![deny(unsafe_op_in_unsafe_fn)]

library/core/src/lib.rs

@@ -61,7 +61,6 @@
 #![warn(deprecated_in_future)]
 #![warn(missing_docs)]
 #![warn(missing_debug_implementations)]
-#![deny(intra_doc_resolution_failures)] // rustdoc is run without -D warnings
 #![allow(explicit_outlives_requirements)]
 #![allow(incomplete_features)]
 #![feature(allow_internal_unstable)]
@@ -149,7 +148,6 @@
 #![feature(slice_ptr_get)]
 #![feature(no_niche)] // rust-lang/rust#68303
 #![feature(unsafe_block_in_unsafe_fn)]
-#![deny(intra_doc_resolution_failures)]
 #![deny(unsafe_op_in_unsafe_fn)]
 
 #[prelude_import]

library/std/src/lib.rs

@@ -212,7 +212,6 @@
 #![warn(deprecated_in_future)]
 #![warn(missing_docs)]
 #![warn(missing_debug_implementations)]
-#![deny(intra_doc_resolution_failures)] // rustdoc is run without -D warnings
 #![allow(explicit_outlives_requirements)]
 #![allow(unused_lifetimes)]
 // Tell the compiler to link to either panic_abort or panic_unwind