ref(pkg/envoy/route): rm unused constants (openservicemesh#1631)

* rm unused constants
* update in line comment style

pkg/envoy/route/config.go

@@ -35,21 +35,15 @@ const (
 	//OutboundRouteConfigName is the name of the route config that the envoy will identify
 	OutboundRouteConfigName = "RDS_Outbound"
 
-	// maxRegexProgramSize is the max supported regex complexity
-	maxRegexProgramSize = 1024
-
-	//InboundVirtualHost is the name of the virtual host on the inbound route configuration
+	// inboundVirtualHost is the name of the virtual host on the inbound route configuration
 	inboundVirtualHost = "inbound_virtualHost"
 
-	//OutboundVirtualHost is the name of the virtual host on the outbound route configuration
+	// outboundVirtualHost is the name of the virtual host on the outbound route configuration
 	outboundVirtualHost = "outbound_virtualHost"
 
 	// MethodHeaderKey is the key of the header for HTTP methods
 	MethodHeaderKey = ":method"
 
-	// wildcardPathPrefix is the wildcard path prefix for HTTP paths
-	wildcardPathPrefix = "/"
-
 	// httpHostHeader is the name of the HTTP host header
 	httpHostHeader = "host"
 )