cmd/tailscale/cli: un-alpha login+switch in ShortUsage docs

Change-Id: I580d4417cf03833dfa8f6a295fb416faa667c477
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

cmd/tailscale/cli/login.go

@@ -15,7 +15,7 @@ var loginArgs upArgsT
 
 var loginCmd = &ffcli.Command{
 	Name:       "login",
-	ShortUsage: "[ALPHA] login [flags]",
+	ShortUsage: "login [flags]",
 	ShortHelp:  "Log in to a Tailscale account",
 	LongHelp: `"tailscale login" logs this machine in to your Tailscale network.
 This command is currently in alpha and may change in the future.`,

cmd/tailscale/cli/switch.go

@@ -26,8 +26,8 @@ var switchCmd = &ffcli.Command{
 	Exec: switchProfile,
 	UsageFunc: func(*ffcli.Command) string {
 		return `USAGE
-  [ALPHA] switch <name>
-  [ALPHA] switch --list
+  switch <name>
+  switch --list
 
 "tailscale switch" switches between logged in accounts.
 This command is currently in alpha and may change in the future.`