src/panic.c: Remove unneeded #include of gsm_utils.h

Change-Id: I25cea5d3a4a900550e8f18c2bea392e642bfb191
diff --git a/src/panic.c b/src/panic.c
index 0ce50db..e233588 100644
--- a/src/panic.c
+++ b/src/panic.c
@@ -28,7 +28,6 @@
  *  \brief Routines for panic handling
  */
 
-#include <osmocom/gsm/gsm_utils.h>
 #include <osmocom/core/panic.h>
 #include <osmocom/core/backtrace.h>