remove msc specific db counters

DB counters has been used to save osmo_counters & osmo_rate_ctr to a local
sqlite databases every 60 seconds.
This is quite slow e.g. 1000 subscriber might slow the msc down.

Change-Id: Id64f1839a55b5326f74ec04b7a5dbed9d269b89c
diff --git a/doc/manuals/chapters/running.adoc b/doc/manuals/chapters/running.adoc
index cb68157..9d56f1f 100644
--- a/doc/manuals/chapters/running.adoc
+++ b/doc/manuals/chapters/running.adoc
@@ -43,8 +43,8 @@
 *-m, --mncc-sock*::
 	Same as option -M (deprecated).
 *-C, --no-dbcounter*::
-	Disable the regular periodic synchronization of statistics
-	counters to the database.
+	Deprecated. DB statistics and counter has been removed.
+	This option is only valid for compatiblity and does nothing.
 
 
 === Multiple instances