gprs_ns2_fr: remove include <linux/if.h>
It's not needed because net/if.h already include
the required parts. Furthermore the linux/if.h generates
a compiler error in combination with net/if.h on older systems
(e.g. debian jessie)
Change-Id: Iccf931207d8bea19969fbfc4225f622a1a709972
diff --git a/src/gb/gprs_ns2_fr.c b/src/gb/gprs_ns2_fr.c
index 4140171..47d3a5d 100644
--- a/src/gb/gprs_ns2_fr.c
+++ b/src/gb/gprs_ns2_fr.c
@@ -42,7 +42,6 @@
#include <netpacket/packet.h>
#include <linux/if_ether.h>
#include <linux/hdlc.h>
-#include <linux/if.h>
#include <osmocom/gprs/frame_relay.h>
#include <osmocom/core/byteswap.h>