libnetwork/config: remove ParseConfig()

Libnetwork configuration files were only used as part of integration tests using
the dnet utility, which was removed in 7266a956a8

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit 46f4a45769)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

libnetwork/config/config.go

@@ -1,7 +1,6 @@
 package config
 
 import (
-	"os"
 	"strings"
 
 	"github.com/docker/docker/libnetwork/cluster"
@@ -11,7 +10,6 @@ import (
 	"github.com/docker/docker/libnetwork/osl"
 	"github.com/docker/docker/pkg/plugingetter"
 	"github.com/docker/libkv/store"
-	"github.com/pelletier/go-toml"
 	"github.com/sirupsen/logrus"
 )
 
@@ -51,23 +49,6 @@ func (c *Config) LoadDefaultScopes(dataDir string) {
 	}
 }
 
-// ParseConfig parses the libnetwork configuration file
-func ParseConfig(tomlCfgFile string) (*Config, error) {
-	cfg := &Config{
-		Scopes: map[string]*datastore.ScopeCfg{},
-	}
-	data, err := os.ReadFile(tomlCfgFile)
-	if err != nil {
-		return nil, err
-	}
-	if err := toml.Unmarshal(data, cfg); err != nil {
-		return nil, err
-	}
-
-	cfg.LoadDefaultScopes(cfg.Daemon.DataDir)
-	return cfg, nil
-}
-
 // ParseConfigOptions parses the configuration options and returns
 // a reference to the corresponding Config structure
 func ParseConfigOptions(opts ...Option) *Config {

libnetwork/config/config_test.go

@@ -7,20 +7,6 @@ import (
 	"github.com/docker/docker/libnetwork/netlabel"
 )
 
-func TestInvalidConfig(t *testing.T) {
-	_, err := ParseConfig("invalid.toml")
-	if err == nil {
-		t.Fatal("Invalid Configuration file must fail")
-	}
-}
-
-func TestConfig(t *testing.T) {
-	_, err := ParseConfig("libnetwork.toml")
-	if err != nil {
-		t.Fatal("Error parsing a valid configuration file :", err)
-	}
-}
-
 func TestOptionsLabels(t *testing.T) {
 	c := &Config{}
 	l := []string{

libnetwork/config/libnetwork.toml

@@ -1,9 +0,0 @@
-title = "LibNetwork Configuration file"
-
-[daemon]
-  debug = false
-[cluster]
-  discovery = "token://swarm-discovery-token"
-  Address = "Cluster-wide reachable Host IP"
-[datastore]
-  embedded = false