Rollup merge of #65321 - Mark-Simulacrum:remove-linker-no-utf8-test, r=nikomatsakis

Remove painful test that is not pulling its weight

Research suggests that we are not properly testing this case anyway, and
even if we were, it is unlikely that we will regress here -- or, perhaps
more accurately, if we do, I am uncertain that we care too much. It
definitely seems like an edge case, and one that is particularly
unlikely to occur as time goes on.

Fixes https://github.com/rust-lang/rust/issues/63520

src/test/run-make-fulldeps/linker-output-non-utf8/Makefile

@@ -1,23 +0,0 @@
--include ../tools.mk
-
-# Make sure we don't ICE if the linker prints a non-UTF-8 error message.
-
-# ignore-windows
-#
-# This does not work in its current form on windows, possibly due to
-# gcc bugs or something about valid Windows paths.  See issue #29151
-# for more information.
-
-# ignore-macos
-#
-# This also does not work on Apple APFS due to the filesystem requiring
-# valid UTF-8 paths.
-
-# The zzz it to allow humans to tab complete or glob this thing.
-bad_dir := $(TMPDIR)/zzz$$'\xff'
-
-all:
-	$(RUSTC) library.rs
-	mkdir $(bad_dir)
-	mv $(TMPDIR)/liblibrary.a $(bad_dir)
-	$(RUSTC) -L $(bad_dir) exec.rs 2>&1 | $(CGREP) this_symbol_not_defined

src/test/run-make-fulldeps/linker-output-non-utf8/exec.rs

@@ -1,6 +0,0 @@
-#[link(name="library")]
-extern "C" {
-    fn foo();
-}
-
-fn main() { unsafe { foo(); } }

src/test/run-make-fulldeps/linker-output-non-utf8/library.rs

@@ -1,10 +0,0 @@
-#![crate_type = "staticlib"]
-
-extern "C" {
-    fn this_symbol_not_defined();
-}
-
-#[no_mangle]
-pub extern "C" fn foo() {
-    unsafe { this_symbol_not_defined(); }
-}