Remove duplicate section (syslog-ng#193)

batch-timeout.md is already included on line 27.

Author: HofiOne

doc/_admin-guide/070_Destinations/220_Riemann/000_Riemann_options.md

@@ -111,8 +111,6 @@ destination d_riemann {
 
 {% include doc/admin-guide/options/host.md %}
 
-{% include doc/admin-guide/options/batch-timeout.md %}
-
 ## host()
 
 |  Type:|      template, macro, or string|