control/controlclient: remove redundant Hostinfo log

The direct client already logs it in JSON form. Then it's immediately
logged again in an unformatted dump, so this removes that unformatted
one.

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

control/controlclient/auto.go

@@ -605,7 +605,6 @@ func (c *Client) SetHostinfo(hi *tailcfg.Hostinfo) {
 		// No changes. Don't log.
 		return
 	}
-	c.logf("Hostinfo: %v", hi)
 
 	// Send new Hostinfo to server
 	c.sendNewMapRequest()