Bug 32622: Fix Auth.t on D10

Bug 32622: Fix Auth.t on D10

It's caused by a version mismatch of Test::MockModule with D10,
which does not have this commit: https://github.com/geofffranks/test-mockmodule/commit/fef9e742e45e2437e3449eea9970d70555d44bff

We should remove the chaining here.

Test plan:
Confirm that Auth.t still pass, and is fixed on D10

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit d3b4edf009ca7a29341f2dc8a8cebfdc807bad6d)
Signed-off-by: Jacob O'Mara <jacob.omara@ptfs-europe.com>