tidy: remove obsolete exceptions from pal test

Author: joboet

src/tools/tidy/src/pal.rs

@@ -59,12 +59,9 @@ const EXCEPTION_PATHS: &[&str] = &[
     "library/std/src/os",  // Platform-specific public interfaces
     // Temporary `std` exceptions
     // FIXME: platform-specific code should be moved to `sys`
-    "library/std/src/io/copy.rs",
     "library/std/src/io/stdio.rs",
     "library/std/src/lib.rs", // for miniz_oxide leaking docs, which itself workaround
     "library/std/src/path.rs",
-    "library/std/src/sys_common", // Should only contain abstractions over platforms
-    "library/std/src/net/test.rs", // Utility helpers for tests
     "library/std/src/io/error.rs", // Repr unpacked needed for UEFI
 ];