detect/engine: simplify stats counters registration

Author: jufajardini

src/detect-engine.c

@@ -3481,10 +3481,8 @@ DetectEngineThreadCtx *DetectEngineThreadCtxInitForReload(
     det_ctx->counter_alerts_overflow = StatsRegisterCounter("detect.alert_queue_overflow", tv);
     det_ctx->counter_alerts_suppressed = StatsRegisterCounter("detect.alerts_suppressed", tv);
 #ifdef PROFILING
-    uint16_t counter_mpm_list = StatsRegisterAvgCounter("detect.mpm_list", tv);
-    uint16_t counter_match_list = StatsRegisterAvgCounter("detect.match_list", tv);
-    det_ctx->counter_mpm_list = counter_mpm_list;
-    det_ctx->counter_match_list = counter_match_list;
+    det_ctx->counter_mpm_list = StatsRegisterAvgCounter("detect.mpm_list", tv);
+    det_ctx->counter_match_list = StatsRegisterAvgCounter("detect.match_list", tv);
 #endif
 
     if (mt && DetectEngineMultiTenantEnabled()) {