timedated: make ntp_synced() static

No need to have this in basic.

src/basic/time-util.c

@@ -7,7 +7,6 @@
 #include <sys/mman.h>
 #include <sys/time.h>
 #include <sys/timerfd.h>
-#include <sys/timex.h>
 #include <sys/types.h>
 #include <unistd.h>
 
@@ -1245,21 +1244,6 @@ int parse_nsec(const char *t, nsec_t *nsec) {
         return 0;
 }
 
-bool ntp_synced(void) {
-        struct timex txc = {};
-
-        if (adjtimex(&txc) < 0)
-                return false;
-
-        /* Consider the system clock synchronized if the reported maximum error is smaller than the maximum
-         * value (16 seconds). Ignore the STA_UNSYNC flag as it may have been set to prevent the kernel from
-         * touching the RTC. */
-        if (txc.maxerror >= 16000000)
-                return false;
-
-        return true;
-}
-
 int get_timezones(char ***ret) {
         _cleanup_fclose_ FILE *f = NULL;
         _cleanup_strv_free_ char **zones = NULL;

src/basic/time-util.h

@@ -133,8 +133,6 @@ int parse_sec_def_infinity(const char *t, usec_t *usec);
 int parse_time(const char *t, usec_t *usec, usec_t default_unit);
 int parse_nsec(const char *t, nsec_t *nsec);
 
-bool ntp_synced(void);
-
 int get_timezones(char ***l);
 bool timezone_is_valid(const char *name, int log_level);
 

src/timedate/timedated.c

@@ -2,6 +2,7 @@
 
 #include <errno.h>
 #include <sys/stat.h>
+#include <sys/timex.h>
 #include <sys/types.h>
 #include <unistd.h>
 
@@ -556,6 +557,18 @@ static int unit_enable_or_disable(UnitStatusInfo *u, sd_bus *bus, sd_bus_error *
         return 0;
 }
 
+static bool ntp_synced(void) {
+        struct timex txc = {};
+
+        if (adjtimex(&txc) < 0)
+                return false;
+
+        /* Consider the system clock synchronized if the reported maximum error is smaller than the maximum
+         * value (16 seconds). Ignore the STA_UNSYNC flag as it may have been set to prevent the kernel from
+         * touching the RTC. */
+        return txc.maxerror < 16000000;
+}
+
 static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_time, "t", now(CLOCK_REALTIME));
 static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_ntp_sync, "b", ntp_synced());