Fix pylint issues. ``` tools/auto_analyse_raw_data.py:11:0: R0205: Class 'RawIRMessage' inherits from object, can be safely removed from bases in python3 (useless-object-inheritance) tools/auto_analyse_raw_data.py:702:2: R1705: Unnecessary "elif" after "return" (no-else-return) ```
Fix pylint issues.
```
tools/auto_analyse_raw_data.py:11:0: R0205: Class 'RawIRMessage' inherits from object, can be safely removed from bases in python3 (useless-object-inheritance)
tools/auto_analyse_raw_data.py:702:2: R1705: Unnecessary "elif" after "return" (no-else-return)
```

markszabo/IRremoteESP8266,markszabo/IRremoteESP8266,markszabo/IRremoteESP8266,markszabo/IRremoteESP8266