Remove normative text (already part of equations-chapter),

and replace it with some relevant introduction.

chapters/connectors.tex

@@ -2,8 +2,8 @@ \chapter{Connectors and Connections}\label{connectors-and-connections}
 
 This chapter covers connectors, connect-equations, and connections.
 
-The special functions \lstinline!cardinality!, \lstinline!rooted! (deprecated),
-\lstinline!Connections.isRoot!, and \lstinline!Connections.rooted! may not be used to control them.
+Connectors and connect-equations are designed so that different components can be connected graphically
+with well-defined semantics. However, the graphical part is optional and found in \cref{annotations}.
 
 \section{Connect-Equations and Connectors}\label{connect-equations-and-connectors}