Remove unused C macros

Also, pacify ‘gcc -Wunused-macros’, which was employed to find
these unused macros.
* localtime.c (NETBSD_INSPIRED_EXTERN):
Define only if STD_INSPIRED is defined.
* private.h (sys_time) [!TZ_TIME_T]:
Inspect LOCALTIME_IMPLEMENTATION.
* zdump.c (MAX_STRING_LENGTH):
* zic.c (PRIdZIC):
Remove these macros, which are no longer used.

4 files changed, 12 insertions, 16 deletions

diff --git a/localtime.c b/localtime.c
index d3e406b..82a3b70 100644
--- a/localtime.c
+++ b/localtime.c
@@ -28,14 +28,6 @@ static int lock(void) { return 0; }
 static void unlock(void) { }
 #endif
 
-/* NETBSD_INSPIRED_EXTERN functions are exported to callers if
-   NETBSD_INSPIRED is defined, and are private otherwise.  */
-#if NETBSD_INSPIRED
-# define NETBSD_INSPIRED_EXTERN
-#else
-# define NETBSD_INSPIRED_EXTERN static
-#endif
-
 #ifndef TZ_ABBR_MAX_LEN
 #define TZ_ABBR_MAX_LEN	16
 #endif /* !defined TZ_ABBR_MAX_LEN */
@@ -2247,6 +2239,14 @@ leapcorr(struct state const *sp, time_t t)
 
 #ifdef STD_INSPIRED
 
+/* NETBSD_INSPIRED_EXTERN functions are exported to callers if
+   NETBSD_INSPIRED is defined, and are private otherwise.  */
+# if NETBSD_INSPIRED
+#  define NETBSD_INSPIRED_EXTERN
+# else
+#  define NETBSD_INSPIRED_EXTERN static
+# endif
+
 /*
 ** IEEE Std 1003.1 (POSIX) says that 536457599
 ** shall correspond to "Wed Dec 31 23:59:59 UTC 1986", which
diff --git a/private.h b/private.h
index 9efcd78..a919e4f 100644
--- a/private.h
+++ b/private.h
@@ -418,10 +418,11 @@ typedef unsigned long uintmax_t;
 # define TZ_TIME_T 0
 #endif
 
-#if TZ_TIME_T
-# ifdef LOCALTIME_IMPLEMENTATION
+#if defined LOCALTIME_IMPLEMENTATION && TZ_TIME_T
 static time_t sys_time(time_t *x) { return time(x); }
-# endif
+#endif
+
+#if TZ_TIME_T
 
 typedef time_tz tz_time_t;
 
diff --git a/zdump.c b/zdump.c
index b532fe3..57e363e 100644
--- a/zdump.c
+++ b/zdump.c
@@ -42,10 +42,6 @@
 #define ZDUMP_HI_YEAR	2500
 #endif /* !defined ZDUMP_HI_YEAR */
 
-#ifndef MAX_STRING_LENGTH
-#define MAX_STRING_LENGTH	1024
-#endif /* !defined MAX_STRING_LENGTH */
-
 #define SECSPERNYEAR	(SECSPERDAY * DAYSPERNYEAR)
 #define SECSPERLYEAR	(SECSPERNYEAR + SECSPERDAY)
 #define SECSPER400YEARS	(SECSPERNYEAR * (intmax_t) (300 + 3)	\
diff --git a/zic.c b/zic.c
index b37cdc9..51977b2 100644
--- a/zic.c
+++ b/zic.c
@@ -21,7 +21,6 @@
 typedef int_fast64_t	zic_t;
 #define ZIC_MIN INT_FAST64_MIN
 #define ZIC_MAX INT_FAST64_MAX
-#define PRIdZIC PRIdFAST64
 #define SCNdZIC SCNdFAST64
 
 #ifndef ZIC_MAX_ABBR_LEN_WO_WARN