Apparently protocol v3 still has no response to HELLO

The documentation seems to imply otherwise?

dovecot/dict.go

@@ -72,12 +72,6 @@ func (p *DictProxyServer) handleHello(ctx context.Context, lw unix.LineResponseW
 		return fmt.Errorf("unsupported protocol version %d", majorVersion)
 	}
 
-	// In version 3, HELLO expects a response.
-	if majorVersion == 3 {
-		s := fmt.Sprintf("O%d\t0", majorVersion)
-		return lw.WriteLineCRLF([]byte(s))
-	}
-
 	return nil
 }
 

dovecot/dict_test.go

@@ -93,16 +93,6 @@ func makeTestRequest(t *testing.T, socketPath string, version int, lookupKey, ex
 		t.Fatalf("error writing HELLO: %v", err)
 	}
 
-	if version > 2 {
-		resp, err := conn.ReadLine()
-		if err != nil {
-			t.Fatalf("error reading HELLO response: %v", err)
-		}
-		if resp[0] != 'O' {
-			t.Fatalf("request returned unexpected status: %s", resp)
-		}
-	}
-
 	if err := conn.PrintfLine("L%s", lookupKey); err != nil {
 		t.Fatalf("error writing LOOKUP: %v", err)
 	}