Kernel: Remove misleading FIXME in DevTmpFS

This FIXME does not seem to apply anymore. Yes, symbolic links in all
filesystems appear to be slightly broken, but that has nothing to do
with File::absolute_path. Let's remove the wrong FIXME instead of adding
to the confusion.

Kernel/FileSystem/DevTmpFS.cpp

@@ -126,11 +126,6 @@ InodeMetadata DevTmpFSInode::metadata() const
         break;
     case Type::Link:
         metadata.inode = { fsid(), index() };
-        // FIXME: For now, it might not be possible to change the m_mode due to
-        // it pointing to another device node which its absolute_path() is not
-        // recognizable by the VirtualFileSystem.
-        // When we resolve the issues with the clunky absolute_path() interface,
-        // this should work out of the box...
         metadata.mode = S_IFLNK | m_mode;
         break;
     default: