function to remove gnu social

src/freedombone-app-gnusocial

 SHARINGS_THEME_REPO="http://git.lasindias.club/manuel/SharingsTheme"
 SHARINGS_THEME_COMMIT='7106c7ef03'
 
+function remove_gnu_social {
+	if ! grep -Fxq "install_gnu_social" $COMPLETION_FILE; then
+		return
+	fi
+	nginx_dissite $MICROBLOG_DOMAIN_NAME
+	if [ -d /var/www/$MICROBLOG_DOMAIN_NAME ]; then
+		rm -rf /var/www/$MICROBLOG_DOMAIN_NAME
+	fi
+	if [ -f /etc/nginx/sites-available/$MICROBLOG_DOMAIN_NAME ]; then
+		rm /etc/nginx/sites-available/$MICROBLOG_DOMAIN_NAME
+	fi
+	function_check drop_database
+	drop_database gnusocial
+	sed -i '/install_gnu_social/d' $COMPLETION_FILE
+	sed -i '/GNU Social /d' $COMPLETION_FILE
+}
+
 function install_gnu_social {
 	if [[ $SYSTEM_TYPE == "$VARIANT_CLOUD" || $SYSTEM_TYPE == "$VARIANT_MAILBOX" || $SYSTEM_TYPE == "$VARIANT_CHAT" || $SYSTEM_TYPE == "$VARIANT_WRITER" || $SYSTEM_TYPE == "$VARIANT_MEDIA" || $SYSTEM_TYPE == "$VARIANT_DEVELOPER" || $SYSTEM_TYPE == "$VARIANT_MESH" ]]; then
 		return

src/freedombone-utils-database

 	mysql -u root --password="$MARIADB_PASSWORD" -e "$database_query" $database_name
 }
 
+function drop_database {
+	database_name=$1
+	mysqladmin -uroot -p"$MARIADB_PASSWORD" -f drop $database_name
+}
+
 # NOTE: deliberately there is no "exit 0"