Revert "Add missing node tracking for config-defined nodes"

This reverts commit 9ec193ef1d.

config.go

@@ -2,7 +2,6 @@ package tendrils
 
 import (
 	"encoding/json"
-	"net"
 	"os"
 
 	"gopkg.in/yaml.v3"
@@ -13,54 +12,10 @@ type Config struct {
 }
 
 type Location struct {
-	Name      string       `yaml:"name" json:"name"`
-	Direction string       `yaml:"direction,omitempty" json:"direction,omitempty"`
-	Nodes     []*NodeRef   `yaml:"nodes,omitempty" json:"nodes,omitempty"`
-	Children  []*Location  `yaml:"children,omitempty" json:"children,omitempty"`
-}
-
-type NodeRef struct {
-	Name string `yaml:"name,omitempty" json:"name,omitempty"`
-	MAC  string `yaml:"mac,omitempty" json:"mac,omitempty"`
-	IP   string `yaml:"ip,omitempty" json:"ip,omitempty"`
-}
-
-func (r *NodeRef) DisplayName() string {
-	if r.Name != "" {
-		return r.Name
-	}
-	if r.MAC != "" {
-		return r.MAC
-	}
-	return r.IP
-}
-
-func (r *NodeRef) ParseMAC() net.HardwareAddr {
-	if r.MAC == "" {
-		return nil
-	}
-	mac, _ := net.ParseMAC(r.MAC)
-	return mac
-}
-
-func (r *NodeRef) ParseIP() net.IP {
-	if r.IP == "" {
-		return nil
-	}
-	return net.ParseIP(r.IP)
-}
-
-func (c *Config) AllNodeRefs() []*NodeRef {
-	var refs []*NodeRef
-	var collect func([]*Location)
-	collect = func(locs []*Location) {
-		for _, loc := range locs {
-			refs = append(refs, loc.Nodes...)
-			collect(loc.Children)
-		}
-	}
-	collect(c.Locations)
-	return refs
+	Name      string      `yaml:"name" json:"name"`
+	Direction string      `yaml:"direction,omitempty" json:"direction,omitempty"`
+	Nodes     []string    `yaml:"nodes,omitempty" json:"nodes,omitempty"`
+	Children  []*Location `yaml:"children,omitempty" json:"children,omitempty"`
 }
 
 func LoadConfig(path string) (*Config, error) {