Remove obsolete msBetweenCommands config

Remove the no longer used msBetweenCommands config.  The RCON connection
was changed to be limited to 5 concurrent commands instead.

CHANGELOG.md

@@ -132,6 +132,8 @@ Version 2.0.0
 - Removed clusterioMod plugin specific config options logItemTransfers,
   disableFairItemDistribution useNeuralNetDoleDivider, autosaveInterval, and
   disableImportsOfEverythingExceptElectricity from the master config.
+- Removed msBetweenCommands config option.  The RCON is instead limited to 5
+  concurrent commands.
 
 
 Version 1.2.4

config.json.dist

@@ -29,6 +29,5 @@
 		"public": true,
 		"lan": true
 	},
-	"msBetweenCommands": 10,
 	"allowRemoteCommandExecution": true
 }