Remove \includegraphics 'width' specifications in commented-out code

chapters/synchronous.tex

@@ -173,9 +173,9 @@ \subsection{Clocks and Clocked Variables}\label{clocks-and-clocked-variables}
 %   https://github.com/brucemiller/LaTeXML/issues/1292 (marked as fixed as of commit 9f5c893b)
 %\begin{figure}[tb]
 %  \centering
-%  \subfloat[A piecewise-constant variable.]{\includegraphics[width=5cm]{piecewise}\label{fig:piecewise-constant-variable}}
-%  \subfloat[A clock variable.]{\includegraphics[width=5cm]{clock}\label{fig:clock-variable}}
-%  \subfloat[A clocked variable.]{\includegraphics[width=5cm]{clocked}\label{fig:clocked-variable}}
+%  \subfloat[A piecewise-constant variable.]{\includegraphics{piecewise}\label{fig:piecewise-constant-variable}}
+%  \subfloat[A clock variable.]{\includegraphics{clock}\label{fig:clock-variable}}
+%  \subfloat[A clocked variable.]{\includegraphics{clocked}\label{fig:clocked-variable}}
 %  \caption{The different kinds of discrete-time variables.  The \lstinline!hold! extrapolation of the clocked variable is illustrated with dashed green lines.}
 %\end{figure}