Remove superfluous architecture limit

The GPSMON_METRIC_MAX setting was only used for platforms where we
couldn't link with libsigar (namely Solaris, making these defines
even more redundant as they weren't applicable in the first case),
and support for that has long since been ripped out so remove the
useless defines too.

Also remove a commented out variable while in there.
Reviewed-by: NJimmy Yih <jyih@pivotal.io>
Reviewed-by: NHeikki Linnakangas <hlinnakangas@pivotal.io>

gpAux/gpperfmon/src/gpmon/gpmonlib.h

@@ -27,22 +27,11 @@ typedef int SOCKET;
 #define ASSERT(x)    if (x) ; else gpmon_fatal(FLINE, "Check condition:%s failed", #x)
 
 extern int verbose;
-/* TODO: REMOVE */
-//extern int very_verbose;
 #define TR0(x) gpmon_print x
 #define TR1(x) if (verbose == 1) gpmon_print x
 #define TR2(x) if (verbose == 2) gpmon_print x
 #define TR1_FILE(x) if (verbose == 1) gpmon_print_file x
 
-/* Architecture specific limits for metrics */
-#if defined(osx104_x86) || defined(osx105_x86)
-	#define GPSMON_METRIC_MAX 0xffffffffUL
-#elif defined(rhel7_x86_64) || defined(rhel6_x86_64) || defined(suse10_x86_64)
-	#define GPSMON_METRIC_MAX 0xffffffffffffffffULL
-#else
-	#define GPSMON_METRIC_MAX 0xffffffffUL
-#endif
-
 #define GPMON_DATE_BUF_SIZE 24