Remove -Alinker-messages

This lint is allowed by default nowadays.

Author: bjorn3

src/bootstrap/src/core/builder/cargo.rs

@@ -331,10 +331,6 @@ impl Cargo {
             self.rustflags.arg("-Clink-arg=-gz");
         }
 
-        // Ignore linker warnings for now. These are complicated to fix and don't affect the build.
-        // FIXME: we should really investigate these...
-        self.rustflags.arg("-Alinker-messages");
-
         // Throughout the build Cargo can execute a number of build scripts
         // compiling C/C++ code and we need to pass compilers, archivers, flags, etc
         // obtained previously to those build scripts.