[dataimport] remove threading support from SQLGenObjectStore
It's untested and does not actually work at the moment with nb_threads > 1.
related to #9177565.
\.svn
^build$
^dist$
\.egg-info$
^.tox$
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\~$
\#.*?\#$
\.swp$
^doc/book/en/apidoc$
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syntax: regexp
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.*/data/database/tmpdb.*
.*/data/ldapdb/.*
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