subsys: remove unused code

Remove legacy call to `zb_enable_distributed()`.

Signed-off-by: Eduardo Montoya <[email protected]>

Author: edmont

subsys/osif/zb_nrf_platform.c

@@ -325,11 +325,6 @@ int zigbee_init(void)
 #elif defined(CONFIG_ZIGBEE_ROLE_ROUTER)
 	zb_set_network_router_role(channel_mask);
 
-/* Enable full distributed network operability. */
-#if (ZBOSS_MAJOR == 3U) && (ZBOSS_MINOR == 11U)
-	zb_enable_distributed();
-#endif
-
 #elif defined(CONFIG_ZIGBEE_ROLE_END_DEVICE)
 	zb_set_network_ed_role(channel_mask);
 #else