[expr.sizeof] Integrate footnote into containing note

Author: jensmaurer

source/expressions.tex

@@ -4784,10 +4784,8 @@
 \begin{note}
 In particular, the values of \tcode{\keyword{sizeof}(\keyword{bool})}, \tcode{\keyword{sizeof}(\keyword{char16_t})},
 \tcode{\keyword{sizeof}(\keyword{char32_t})}, and \tcode{\keyword{sizeof}(\keyword{wchar_t})} are
-implementation-defined.
-\begin{footnote}
+implementation-defined;
 \tcode{\keyword{sizeof}(\keyword{bool})} is not required to be \tcode{1}.
-\end{footnote}
 \end{note}
 \begin{note}
 See~\ref{intro.memory} for the definition of byte