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:
42:f69b81aa9eb1
Parent:
34:4aa9e92d1a58
Child:
43:5887ae6c0c2c
--- a/lwip-sys.lib	Thu Jun 12 13:54:54 2014 +0000
+++ b/lwip-sys.lib	Wed Jul 30 15:21:46 2014 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/mbed_official/code/lwip-sys/#09b0951b1899
+http://mbed.org/users/mbed_official/code/lwip-sys/#011623753f2e