[class.conv.general] Remove vague reference to unhelpful examples

Fixes ISO/CS comment (C++23 proof)

Author: jensmaurer

source/classes.tex

@@ -2292,8 +2292,7 @@
 
 \pnum
 \begin{note}
-See~\ref{over.match} for a discussion of the use of conversions in function calls
-as well as examples below.
+See~\ref{over.match} for a discussion of the use of conversions in function calls.
 \end{note}
 
 \pnum