'SUPPRESS_LABEL_WARNING' flag not working for false value

[GanziDaeyong]

Hi. I've found that in the latest version (v3.51.6), the suppress label warning flag doesn't seem to work when set to false.

to reproduce the issue: Set the environment variable SUPPRESS_LABEL_WARNING to 'False' or any value other than 'True'.

[anup-21]

Thanks for highlighting this , in case you don't want to use the env variable then unset the variable instead of setting it to false or any other value i.e. unset SUPPRESS_LABEL_WARNING

[GanziDaeyong]

@anup-21 Thank you. Considering the consistency with the error message and the error suppressing pattern used in other parts of the code, I think it needs to be fixed, so I've submitted a PR. Could you please check it out when you have a moment?