MINOR: contrib/prometheus-exporter: use stats desc when possible followup

Remove remaining descrition which are common to stats.c.

This patch is a followup of commit
82b2ce2f967d967139adb7afab064416fadad615 ("MINOR:
contrib/prometheus-exporter: use stats desc when possible"). I probably
messed up with one of my rebase because I'm pretty sure I removed them
at some point, but who knows what happened.

Signed-off-by: William Dauchy <wdauchy@gmail.com>
diff --git a/contrib/prometheus-exporter/service-prometheus.c b/contrib/prometheus-exporter/service-prometheus.c
index 126962f..7693897 100644
--- a/contrib/prometheus-exporter/service-prometheus.c
+++ b/contrib/prometheus-exporter/service-prometheus.c
@@ -284,42 +284,7 @@
 
 /* Description of overriden stats fields */
 const struct ist promex_st_metric_desc[ST_F_TOTAL_FIELDS] = {
-	[ST_F_PXNAME]         = IST("The proxy name."),
-	[ST_F_SVNAME]         = IST("The service name (FRONTEND for frontend, BACKEND for backend, any name for server/listener)."),
-	[ST_F_QCUR]           = IST("Current number of queued requests."),
-	[ST_F_QMAX]           = IST("Maximum observed number of queued requests."),
-	[ST_F_SCUR]           = IST("Current number of active sessions."),
-	[ST_F_SMAX]           = IST("Maximum observed number of active sessions."),
-	[ST_F_SLIM]           = IST("Configured session limit."),
-	[ST_F_STOT]           = IST("Total number of sessions."),
-	[ST_F_BIN]            = IST("Current total of incoming bytes."),
-	[ST_F_BOUT]           = IST("Current total of outgoing bytes."),
-	[ST_F_DREQ]           = IST("Total number of denied requests."),
-	[ST_F_DRESP]          = IST("Total number of denied responses."),
-	[ST_F_EREQ]           = IST("Total number of request errors."),
-	[ST_F_ECON]           = IST("Total number of connection errors."),
-	[ST_F_ERESP]          = IST("Total number of response errors."),
-	[ST_F_WRETR]          = IST("Total number of retry warnings."),
-	[ST_F_WREDIS]         = IST("Total number of redispatch warnings."),
 	[ST_F_STATUS]         = IST("Current status of the service, per state label value."),
-	[ST_F_WEIGHT]         = IST("Service weight."),
-	[ST_F_ACT]            = IST("Current number of active servers."),
-	[ST_F_BCK]            = IST("Current number of backup servers."),
-	[ST_F_CHKFAIL]        = IST("Total number of failed check (Only counts checks failed when the server is up)."),
-	[ST_F_CHKDOWN]        = IST("Total number of UP->DOWN transitions."),
-	[ST_F_LASTCHG]        = IST("Number of seconds since the last UP<->DOWN transition."),
-	[ST_F_DOWNTIME]       = IST("Total downtime (in seconds) for the service."),
-	[ST_F_QLIMIT]         = IST("Configured maxqueue for the server (0 meaning no limit)."),
-	[ST_F_PID]            = IST("Process id (0 for first instance, 1 for second, ...)"),
-	[ST_F_IID]            = IST("Unique proxy id."),
-	[ST_F_SID]            = IST("Server id (unique inside a proxy)."),
-	[ST_F_THROTTLE]       = IST("Current throttle percentage for the server, when slowstart is active, or no value if not in slowstart."),
-	[ST_F_LBTOT]          = IST("Total number of times a service was selected, either for new sessions, or when redispatching."),
-	[ST_F_TRACKED]        = IST("Id of proxy/server if tracking is enabled."),
-	[ST_F_TYPE]           = IST("Service type (0=frontend, 1=backend, 2=server, 3=socket/listener)."),
-	[ST_F_RATE]           = IST("Current number of sessions per second over last elapsed second."),
-	[ST_F_RATE_LIM]       = IST("Configured limit on new sessions per second."),
-	[ST_F_RATE_MAX]       = IST("Maximum observed number of sessions per second."),
 	[ST_F_CHECK_STATUS]   = IST("Status of last health check, per state label value."),
 	[ST_F_CHECK_CODE]     = IST("layer5-7 code, if available of the last health check."),
 	[ST_F_CHECK_DURATION] = IST("Total duration of the latest server health check, in seconds."),