get rid of subsection bat

preamble.tex

@@ -84,7 +84,7 @@
 {8pt}
 {\Large\bfseries\filcenter}
 
-\titleformat{\subsection}{\needspace{4cm}\large\bfseries}{}{1em}{\Pisymbol{dingbat}{69}\hspace{-3em}}[\rule{.5\textwidth}{.2pt}]
+\titleformat{\subsection}{\needspace{4cm}\large\bfseries}{}{1em}{}[\rule{.5\textwidth}{.2pt}]
 %
 \titleformat{\subsubsection}
 {\normalfont\normalsize\bfseries}{\thesubsubsection}{1em}{}