Bug 33367: Remove tmp/modified_authorities/README.txt

Bug 33367: Remove tmp/modified_authorities/README.txt

This does not seem to be useful anymore.

Signed-off-by: Phil Ringnalda <phil@chetcolibrary.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit c3a40d3801d8f70fa865e22962f7ae7e9cc18bee)
Signed-off-by: Matt Blenkinsop <matt.blenkinsop@ptfs-europe.com>
(cherry picked from commit bc2c8b16f88c43ac778aed904a288e77561a7033)
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>