Don't delete conf dir

bin/module/dovecot/install.inc

@@ -18,12 +18,11 @@ hestia_module_dovecot_install() {
     osal_package_install $OSAL_PKG_DOVECOT
 
     gpasswd -a dovecot mail > /dev/null 2>&1
-    rm -rf $OSAL_PATH_DOVECOT_CONF_D
     cp -rf $HESTIA_INSTALL_DIR/dovecot/* $OSAL_PATH_DOVECOT_CONF/
     cp -f $HESTIA_INSTALL_DIR/logrotate/dovecot $OSAL_PATH_LOGROTATE_CONF_D/
     chown -R root:root $OSAL_PATH_DOVECOT_CONF
     
-    # FIXME: Why do we do this?
+    # Why do we do this?
     rm -f /etc/dovecot/conf.d/15-mailboxes.conf
 
     osal_service_enable $OSAL_SERVICE_DOVECOT