Remove \textbf on the single restriction that has it in a list of five

chapters/classes.tex

@@ -1098,7 +1098,7 @@ \section{Balanced Models}\doublelabel{balanced-models}
   modifiers for components may in these cases only be for parameters,
   constants, inputs and variables having a default binding equation.
 \item
-  \textbf{All non-partial model and block classes must be locally balanced.}
+  All non-partial model and block classes must be locally balanced.
   \begin{nonnormative}
   This means that the local number of unknowns equals the local equation size.
   \end{nonnormative}