network.rst: remove duplicate method directive

Author: sommersoft

docs/library/network.rst

@@ -247,7 +247,7 @@ Methods
     nic.ifconfig(('192.168.0.4', '255.255.255.0', '192.168.0.1', '8.8.8.8'))
 
 .. method:: wlan.config('param')
-.. method:: wlan.config(param=value, ...)
+            wlan.config(param=value, ...)
 
    Get or set general network interface parameters. These methods allow to work
    with additional parameters beyond standard IP configuration (as dealt with by