Remove libreoffice/unoconv for exports - too heavy

pica-etherpad/Dockerfile

@@ -68,7 +68,7 @@ FROM base
 
 COPY entrypoint.sh /opt/etherpad-lite/entrypoint.sh
 RUN apt-get update && \
-    apt-get install -y default-mysql-client unoconv libreoffice-writer libreoffice-pdfimport && \
+    apt-get install -y default-mysql-client && \
     chmod +x /opt/etherpad-lite/entrypoint.sh && \
     mkdir -p /opt/etherpad-lite && \
     chown -R node /opt/etherpad-lite && \

pica-etherpad/entrypoint.sh

@@ -94,7 +94,6 @@ cat <<- EOF > /opt/etherpad-lite/settings.json
 	"chatAndUsers": false
   },
   "allowUnknownFileEnds": false,
-  "soffice": "/usr/bin/soffice",
 EOF
 
 if [ $ETHERPAD_ADMIN_PASSWORD ]; then