Disable statistics collection (#7162)

Enabled by mistake in

ba40eb363c

src/backend/distributed/shared_library_init.c

@@ -1451,7 +1451,7 @@ RegisterCitusConfigVariables(void)
 					 "and operating system name. This configuration value controls "
 					 "whether these reports are sent."),
 		&EnableStatisticsCollection,
-#if defined(HAVE_LIBCURL)
+#if defined(HAVE_LIBCURL) && defined(ENABLE_CITUS_STATISTICS_COLLECTION)
 		true,
 #else
 		false,

src/backend/distributed/utils/statistics_collection.c

@@ -14,7 +14,11 @@
 #include "fmgr.h"
 #include "utils/uuid.h"
 
+#if defined(HAVE_LIBCURL) && defined(ENABLE_CITUS_STATISTICS_COLLECTION)
 bool EnableStatisticsCollection = true; /* send basic usage statistics to Citus */
+#else
+bool EnableStatisticsCollection = false;
+#endif
 
 PG_FUNCTION_INFO_V1(citus_server_id);