all: remove CLOCK_BOOTTIME defintions

It's useless and redundant noise.

The original motivation seems to have been compatibility with ancient
versions uClibc (2011), but given CLOCK_BOOTTIME definition is shipped with
kernel headers, the libc version shall not matter anyway.

Even if it was the case, uClibc has shipped the definition for over
7 years now and been superseded by uClibc-ng that always had the
definition.

src/nm-core-utils.c

@@ -45,15 +45,6 @@
 #include "nm-setting-wireless.h"
 #include "nm-setting-wireless-security.h"
 
-/*
- * Some toolchains (E.G. uClibc 0.9.33 and earlier) don't export
- * CLOCK_BOOTTIME even though the kernel supports it, so provide a
- * local definition
- */
-#ifndef CLOCK_BOOTTIME
-#define CLOCK_BOOTTIME 7
-#endif
-
 G_STATIC_ASSERT (sizeof (NMUtilsTestFlags) <= sizeof (int));
 static int _nm_utils_testing = 0;
 

src/systemd/sd-adapt/nm-sd-adapt.h

@@ -26,10 +26,6 @@
 #include <sys/resource.h>
 #include <time.h>
 
-#ifndef CLOCK_BOOTTIME
-#define CLOCK_BOOTTIME 7
-#endif
-
 #if defined(HAVE_DECL_REALLOCARRAY) && HAVE_DECL_REALLOCARRAY == 1
 #define HAVE_REALLOCARRAY 1
 #else
@@ -180,15 +176,6 @@ sd_notify (int unset_environment, const char *state)
 #define MAX_HANDLE_SZ 128
 #endif
 
-/*
- * Some toolchains (E.G. uClibc 0.9.33 and earlier) don't export
- * CLOCK_BOOTTIME even though the kernel supports it, so provide a
- * local definition
- */
-#ifndef CLOCK_BOOTTIME
-#define CLOCK_BOOTTIME 7
-#endif
-
 #include "sd-id128.h"
 #include "sparse-endian.h"
 #include "async.h"

src/tests/test-general-with-expect.c

@@ -32,10 +32,6 @@
 
 #include "nm-test-utils-core.h"
 
-#ifndef CLOCK_BOOTTIME
-#define CLOCK_BOOTTIME 7
-#endif
-
 /*****************************************************************************/
 
 static void