Merge pull request #638 from hnyman/statping

luci-app-statistics: Remove usually empty std.dev. graph from ping page

applications/luci-app-statistics/luasrc/statistics/rrdtool/definitions/ping.lua

@@ -23,16 +23,6 @@ function rrdargs( graph, plugin, plugin_instance, dtype )
 			types   = { "ping_droprate" },
 			options = { ping_droprate = {
 				noarea = true, overlay = true, title = "%di" } }
-		} },
+		} }
-
-		-- Ping standard deviation
-		{ title = "%H: ICMP Standard Deviation",
-		  vlabel = "ms",
-		  number_format = "%5.2lf ms",
-		  data = {
-			types   = { "ping_stddev" },
-			options = { ping_stddev = {
-				noarea = true, overlay = true, title = "%di" } }
-		} },
 	}
 end