Remove redundant error handling in test code

The check for io.EOF and the associated print statement were unnecessary because the loop breaks on any error. This change simplifies the error handling logic in the `client_test.go` file and avoids redundant code.

client_test.go

@@ -2100,10 +2100,6 @@ func handleTestServerConnection(connection net.Conn, featureSet string, failRese
 	for {
 		data, err = reader.ReadString('\n')
 		if err != nil {
-			if errors.Is(err, io.EOF) {
-				break
-			}
-			fmt.Println("Error reading data:", err)
 			break
 		}