veyron2/ipc/model.go: Remove method argument from Lookup

This change removes the 'method' argument from the Dispatcher's Lookup
method. It is not used anywhere in a non-trivial way and we don't have
any plan to use it for anything.

Change-Id: I56910d1e863b90b14a800bafb91e46819c3a7fe6
diff --git a/services/mgmt/node/impl/dispatcher.go b/services/mgmt/node/impl/dispatcher.go
index e2c0b59..dd4b647 100644
--- a/services/mgmt/node/impl/dispatcher.go
+++ b/services/mgmt/node/impl/dispatcher.go
@@ -337,7 +337,7 @@
 }
 
 // DISPATCHER INTERFACE IMPLEMENTATION
-func (d *dispatcher) Lookup(suffix, method string) (interface{}, security.Authorizer, error) {
+func (d *dispatcher) Lookup(suffix string) (interface{}, security.Authorizer, error) {
 	components := strings.Split(suffix, "/")
 	for i := 0; i < len(components); i++ {
 		if len(components[i]) == 0 {
@@ -346,10 +346,7 @@
 		}
 	}
 	if len(components) == 0 {
-		if method == ipc.GlobMethod {
-			return ipc.VChildrenGlobberInvoker(nodeSuffix, appsSuffix), d.auth, nil
-		}
-		return nil, nil, errInvalidSuffix
+		return ipc.VChildrenGlobberInvoker(nodeSuffix, appsSuffix), d.auth, nil
 	}
 	// The implementation of the node manager is split up into several
 	// invokers, which are instantiated depending on the receiver name