Remove errorneous include

The gsm_data_shared.h header is installable and used by OsmoBTS so it
should not include any private (non-installable headers) to avoid
OsmoBTS' build failures.

Change-Id: Ic25031101fc01bd732fe691132c081ad05fa6a4b
diff --git a/openbsc/include/openbsc/gsm_data_shared.h b/openbsc/include/openbsc/gsm_data_shared.h
index 0e5bc91..9495f93 100644
--- a/openbsc/include/openbsc/gsm_data_shared.h
+++ b/openbsc/include/openbsc/gsm_data_shared.h
@@ -25,7 +25,6 @@
 #endif
 
 #include <openbsc/common_cs.h>
-#include <openbsc/rest_octets.h>
 
 struct osmo_bsc_data;