Drop redundant items from list of expression variability rules

chapters/operatorsandexpressions.tex

@@ -1351,10 +1351,6 @@ \section{Variability of Expressions}\label{variability-of-expressions}
   For multiple return assignment \lstinline!(x1, $\ldots$, xn) := expr! (see \cref{assignments-from-called-functions-with-multiple-results}), all of \lstinline!x1!, \ldots, \lstinline!xn! must be declared to be at least as variable as \lstinline!expr!.
 \item
   When determining whether an equation can contribute to solving for a variable \lstinline!v! (for instance, when applying the perfect matching rule, see \cref{synchronous-data-flow-principle-and-single-assignment-rule}), the equation can only be considered contributing if the resulting solution would be at most as variable as \lstinline!v!.
-\item
-  The right-hand side expression in a binding equation (that is, \lstinline!expr!) of a parameter component and of the base type attributes (such as \lstinline!start!) needs to be a parameter or constant expression.
-\item
-  If \lstinline!v! is a discrete-time component then \lstinline!expr! needs to be a discrete-time expression.
 \end{itemize}
 
 \begin{example}