Remove now-unnecessary link_args

Removed in rust-lang/rust#56732.

Author: Xanewok

rls/src/main.rs

@@ -5,13 +5,6 @@
 //! functionality such as 'goto definition', symbol search, reformatting, and
 //! code completion, and enables renaming and refactorings.
 
-// See rustc/rustc.rs in rust repo for explanation of stack adjustments.
-#![feature(link_args)]
-#[allow(unused_attributes)]
-#[cfg_attr(all(windows, target_env = "msvc"), link_args = "/STACK:16777216")]
-#[cfg_attr(all(windows, not(target_env = "msvc")), link_args = "-Wl,--stack,16777216")]
-extern "C" {}
-
 use log::warn;
 use rls_rustc as rustc_shim;