Modified getalldelchals of API for delivery notes

Abhijith Balan requested to merge abhijith/gkcore:deliverynote into devel

Modified getalldelchals of API for delivery notes so that godown in charge is only able to view list of delivery notes that involve their assigned godowns. Also removed print statement and comment of try/except in GET for single delivery note.
Closes #351 (closed)

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