remove bt/short_title.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@38165 20353a03-c40f-0410-a6d1-a30d3c3de9de

bt5/erp5_software_pdm/bt/revision

-65
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+66
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bt5/erp5_software_pdm/bt/short_title

-None
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