remove two more exceptions which are not used; these are a holdover from

an older ZConfig API which has not been supported for some time

doc/ZConfig/zconfig.tex

@@ -1147,15 +1147,6 @@ The following exceptions are defined by this package:
   was detected.
 \end{excdesc}
 
-\begin{excdesc}{ConfigurationMissingSectionError}
-  Raised when a requested named section is not available.
-\end{excdesc}
-
-\begin{excdesc}{ConfigurationConflictingSectionError}
-  Raised when a request for a section cannot be fulfilled without
-  ambiguity.
-\end{excdesc}
-
 \begin{excdesc}{DataConversionError}
   Raised when a data type conversion fails with
   \exception{ValueError}.  This exception is a subclass of both