libnetwork: drop (*Controller).ReloadConfiguration

...as it is unused.

Signed-off-by: Cory Snider <csnider@mirantis.com>

libnetwork/controller.go

@@ -368,79 +368,6 @@ func (c *Controller) makeDriverConfig(ntype string) map[string]interface{} {
 	return cfg
 }
 
-var procReloadConfig = make(chan (bool), 1)
-
-// ReloadConfiguration updates the controller configuration.
-func (c *Controller) ReloadConfiguration(cfgOptions ...config.Option) error {
-	procReloadConfig <- true
-	defer func() { <-procReloadConfig }()
-
-	// For now we accept the configuration reload only as a mean to provide a global store config after boot.
-	// Refuse the configuration if it alters an existing datastore client configuration.
-	update := false
-	cfg := config.New(cfgOptions...)
-
-	for s := range c.cfg.Scopes {
-		if _, ok := cfg.Scopes[s]; !ok {
-			return types.ForbiddenErrorf("cannot accept new configuration because it removes an existing datastore client")
-		}
-	}
-	for s, nSCfg := range cfg.Scopes {
-		if eSCfg, ok := c.cfg.Scopes[s]; ok {
-			if eSCfg.Client.Provider != nSCfg.Client.Provider ||
-				eSCfg.Client.Address != nSCfg.Client.Address {
-				return types.ForbiddenErrorf("cannot accept new configuration because it modifies an existing datastore client")
-			}
-		} else {
-			if err := c.initScopedStore(s, nSCfg); err != nil {
-				return err
-			}
-			update = true
-		}
-	}
-	if !update {
-		return nil
-	}
-
-	c.mu.Lock()
-	c.cfg = cfg
-	c.mu.Unlock()
-
-	var dsConfig *discoverapi.DatastoreConfigData
-	for scope, sCfg := range cfg.Scopes {
-		if scope == datastore.LocalScope || !sCfg.IsValid() {
-			continue
-		}
-		dsConfig = &discoverapi.DatastoreConfigData{
-			Scope:    scope,
-			Provider: sCfg.Client.Provider,
-			Address:  sCfg.Client.Address,
-			Config:   sCfg.Client.Config,
-		}
-		break
-	}
-	if dsConfig == nil {
-		return nil
-	}
-
-	c.drvRegistry.WalkIPAMs(func(name string, driver ipamapi.Ipam, cap *ipamapi.Capability) bool {
-		err := driver.DiscoverNew(discoverapi.DatastoreConfig, *dsConfig)
-		if err != nil {
-			logrus.Errorf("Failed to set datastore in driver %s: %v", name, err)
-		}
-		return false
-	})
-
-	c.drvRegistry.WalkDrivers(func(name string, driver driverapi.Driver, capability driverapi.Capability) bool {
-		err := driver.DiscoverNew(discoverapi.DatastoreConfig, *dsConfig)
-		if err != nil {
-			logrus.Errorf("Failed to set datastore in driver %s: %v", name, err)
-		}
-		return false
-	})
-	return nil
-}
-
 // ID returns the controller's unique identity.
 func (c *Controller) ID() string {
 	return c.id