Fix #585: remove MEZEG_AVIR_UNITED from localization.py
Fix #585: remove MEZEG_AVIR_UNITED from localization.py

It is only used in JS anyway, and it is still in localization.js.
united.py has its own dictionary for weather codes.
Having the entry in localization.py causes a KeyError in process.py
because LMS accidents don't have this field.

hasadna/anyway,boazin/anyway,hasadna/anyway,yosinv/anyway,yosinv/anyway,boazin/anyway,hasadna/anyway,boazin/anyway,yosinv/anyway,hasadna/anyway