chg: [usage] remove cached export

1-misp-usage/content.tex

@@ -197,7 +197,6 @@
     \begin{itemize}
         \item Correlation graphs
         \item Downloading the data in various formats
-        \item Cached exports
         \item API (explained later)
         \item Collaborating with users (proposals, discussions, emails)
     \end{itemize}
@@ -247,7 +246,7 @@
         \item Download an event
         \item Quick glance at the APIs
         \item Download search results
-        \item Cached exports
+        \item ReST API and query builder
     \end{itemize}
 \end{frame}