remove two lines to prevent crash during compile for the mbed frdm k64f

Dependencies:   Socket lwip-eth lwip-sys lwip

Fork of EthernetInterface by mbed official

Revision:
51:4d7bff17a592
Parent:
50:dd8331e55fea
Child:
54:183490eb1b4a
--- a/lwip-eth.lib	Fri Oct 16 07:02:48 2015 +0000
+++ b/lwip-eth.lib	Thu Feb 18 04:47:14 2016 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/mbed_official/code/lwip-eth/#72f8b097fbf3
+http://mbed.org/users/mbed_official/code/lwip-eth/#4380f0749039