Rollup merge of rust-lang#83820 - petrochenkov:nolinkargs, r=nagisa

Remove attribute `#[link_args]`

Closes rust-lang#29596

The attribute could always be replaced with `-C link-arg`, but cargo didn't provide a reasonable way to pass such flags to rustc.
Now cargo supports `cargo:rustc-link-arg*` directives in build scripts (https://doc.rust-lang.org/cargo/reference/unstable.html#extra-link-arg), so this attribute can be removed.

Author: Dylan-DPC

std/src/lib.rs

@@ -282,7 +282,6 @@
 #![feature(intra_doc_pointers)]
 #![feature(iter_zip)]
 #![feature(lang_items)]
-#![feature(link_args)]
 #![feature(linkage)]
 #![feature(llvm_asm)]
 #![feature(log_syntax)]