test: full config surface coverage; remove dead PeerUsesTLS helper

internal/config/config.go

@@ -172,15 +172,6 @@ func (c *Config) ListenAddr() string {
 	return fmt.Sprintf(":%d", c.Daemon.Port)
 }
 
-// PeerUsesTLS reports whether the given peer should be contacted over TLS.
-// A per-peer override wins over the global security.tls setting.
-func (c *Config) PeerUsesTLS(p PeerConfig) bool {
-	if p.TLS {
-		return true
-	}
-	return c.Security.TLS
-}
-
 // MaxBodyBytes returns the effective request body size limit, clamped to a
 // sane minimum so a zero/negative config value never disables the limit.
 func (c *Config) MaxBodyBytes() int64 {