fixup macros that don't play well with c2rust

Author: panstromek

macros.h

@@ -36,7 +36,7 @@ extern "C" {
 
 /* Define the inline directive when available */
 #if defined( __GNUC__ )&& !defined( __cplusplus )
-#define INLINE __inline__
+#define INLINE
 #else
 #define INLINE
 #endif

timer.c

@@ -16,18 +16,12 @@
 /* CRON_SUPPORTED should be enabled when Zebra is compiled for
    a Unix system which supports the Cron daemon. */
 
-#ifdef __linux__
-#define CRON_SUPPORTED
-#endif
-
 /* GTC_SUPPORTED should be enabled when Zebra is compiled for
    Windows 95/98/NT and the compiler supports the function
    GetTickCount() and keeps the definition in <windows.h>. */
 
 #include "porting.h"
 
-#define GTC_SUPPORTED
-
 
 
 #include <math.h>