legacy: batchuploader removal
legacy: batchuploader removal

* INCOMPATIBLE Removes legacy batchuploader module. (addresses #3233)

Signed-off-by: Lars Holm Nielsen <7eaffca9f7cd98839b5821d0d23e09ff764b82cd@cern.ch>

inveniosoftware/invenio-access,tiborsimko/invenio-access,inveniosoftware/invenio-access,tiborsimko/invenio-access