control/controlclient: remove unused StartLogout

Updates #cleanup

Co-authored-by: Maisem Ali <maisem@tailscale.com>
Change-Id: I9d052fdbee787f1e8c872124e4bee61c7f04d142
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

control/controlclient/auto.go

@@ -679,17 +679,6 @@ func (c *Auto) Login(t *tailcfg.Oauth2Token, flags LoginFlags) {
 	c.cancelAuth()
 }
 
-func (c *Auto) StartLogout() {
-	c.logf("client.StartLogout()")
-
-	c.mu.Lock()
-	c.loginGoal = &LoginGoal{
-		wantLoggedIn: false,
-	}
-	c.mu.Unlock()
-	c.cancelAuth()
-}
-
 func (c *Auto) Logout(ctx context.Context) error {
 	c.logf("client.Logout()")
 

control/controlclient/client.go

@@ -34,10 +34,6 @@ type Client interface {
 	// LoginFinished flag (on success) or an auth URL (if further
 	// interaction is needed).
 	Login(*tailcfg.Oauth2Token, LoginFlags)
-	// StartLogout starts an asynchronous logout process.
-	// When it finishes, the Status callback will be called while
-	// AuthCantContinue()==true.
-	StartLogout()
 	// Logout starts a synchronous logout process. It doesn't return
 	// until the logout operation has been completed.
 	Logout(context.Context) error