unused fields

[johanneswilm]

editortype
editoratype
editorbtype
editorctype
entrysubtype
file
indextitle
isan
ismn
iswc
label
library
nameaddon
origlocation
origpublisher
origtitle
reprinttitle
shortauthor
shorteditor
shorthand
shorthandintro
shortjournal
shortseries
shorttitle

[zepinglee]

shortjournal can be mapped to container-title-short in CSL.