LWG3822 Avoiding normalization in filesystem::weakly_canonical

Fixes NB US 125 (C++23 CD).

Author: burblebee

source/iostreams.tex

@@ -18327,12 +18327,6 @@
 \pnum
 \throws
 As specified in~\ref{fs.err.report}.
-
-\pnum
-\remarks
-Implementations should
-  avoid unnecessary normalization such as
-  when \tcode{canonical} has already been called on the entirety of \tcode{p}.
 \end{itemdescr}
 
 \rSec1[c.files]{C library files}