[class.eq] Remove redundant repetition of the operator== symmetry rule.

Author: zygoloid

source/classes.tex

@@ -6750,12 +6750,9 @@
   results in an ambiguity or a function
   that is deleted or inaccessible from the operator function, or
 \item
-  \tcode{x == y} or \tcode{y == x}
-  cannot be contextually converted to \tcode{bool}.
+  \tcode{x == y} cannot be contextually converted to \tcode{bool}.
 \end{itemize}
-Otherwise, the operator function yields \tcode{(x == y) ? false : true}
-if an operator \tcode{==} with the original order of parameters was selected,
-or \tcode{(y == x) ? false : true} otherwise.
+Otherwise, the operator function yields \tcode{(x == y) ?\ false :\ true}.
 
 \pnum
 \begin{example}