build+routerrpc+lncli: remove routerrpc conditional compilation

cmd/lncli/cmd_build_route.go

@@ -1,5 +1,3 @@
-// +build routerrpc
-
 package main
 
 import (

cmd/lncli/cmd_query_mission_control.go

@@ -1,5 +1,3 @@
-// +build routerrpc
-
 package main
 
 import (

cmd/lncli/cmd_query_probability.go

@@ -1,5 +1,3 @@
-// +build routerrpc
-
 package main
 
 import (

cmd/lncli/cmd_reset_mission_control.go

@@ -1,5 +1,3 @@
-// +build routerrpc
-
 package main
 
 import (

cmd/lncli/routerrpc.go

@@ -1,10 +1,8 @@
-// +build routerrpc
-
 package main
 
 import "github.com/urfave/cli"
 
-// routerCommands will return nil for non-routerrpc builds.
+// routerCommands returns a list of routerrpc commands.
 func routerCommands() []cli.Command {
 	return []cli.Command{
 		queryMissionControlCommand,

cmd/lncli/routerrpc_default.go

@@ -1,10 +0,0 @@
-// +build !routerrpc
-
-package main
-
-import "github.com/urfave/cli"
-
-// routerCommands will return nil for non-routerrpc builds.
-func routerCommands() []cli.Command {
-	return nil
-}