config: removed trace level from config comment

conf/sample.ini

@@ -298,7 +298,7 @@
 # Use space to separate multiple modes, e.g. "console file"
 ;mode = console file
 
-# Either "trace", "debug", "info", "warn", "error", "critical", default is "info"
+# Either "debug", "info", "warn", "error", "critical", default is "info"
 ;level = info
 
 # optional settings to set different levels for specific loggers. Ex filters = sqlstore:debug