ext.delete: remove unused open
ext.delete: remove unused open

Signed-off-by: David Caro <aa743a0aaec8f7d7a1f01442503957f4d7a2d634@dcaro.es>
Signed-off-by: Nikos Filippakis <9822ea698aace372607e6028f3e9d386653ae7c5@cern.ch>

inveniosoftware/invenio-search,inveniosoftware/invenio-search,tiborsimko/invenio-search,tiborsimko/invenio-search