Fix duplicate import in pth module

Remove duplicate borrow::Cow import in absolute_path.rs that was
causing compilation error. This resolves merge conflict artifacts.

Author: Wandalen

module/core/pth/src/path/absolute_path.rs

@@ -7,7 +7,6 @@ mod private
     path::{ Path, PathBuf },
     borrow::Cow,
     io,
-    borrow::Cow,
   };
   use core::
   {