tcpproxy: remove unused functions

Signed-off-by: Akihiro Suda <[email protected]>

pkg/tcpproxy/tcpproxy.go

@@ -83,16 +83,6 @@ type Proxy struct {
 	ListenFunc func(net, laddr string) (net.Listener, error)
 }
 
-// Matcher reports whether hostname matches the Matcher's criteria.
-type Matcher func(ctx context.Context, hostname string) bool
-
-// equals is a trivial Matcher that implements string equality.
-func equals(want string) Matcher {
-	return func(_ context.Context, got string) bool {
-		return want == got
-	}
-}
-
 // config contains the proxying state for one listener.
 type config struct {
 	routes []route