Fix: Don't convert ISSN/ISBN in MWDeprecated
Fix: Don't convert ISSN/ISBN in MWDeprecated

Changes to fixISBN and fixISSN caused ISBNs and
ISSNs in MWDeprecated to be lists, not strings.
This caused some user gadgets using the older
format to malfunction.

Fixed by removing fixISBN and fixISSN in
convertToMWDeprecatedAsync, leaving them in
their original Zotero format. This will
unbreak existing user gadgets.

Bug: T90463
Change-Id: I9cd957d036171e9efc50d40f73d74870dd149ff3

wikimedia/citoid,wikimedia/citoid,wikimedia/citoid