[nrf fromtree] scripts: requirements: Remove mock

Remove mock from requirements-actions.in as it is not needed anymore.

Signed-off-by: Tim Pambor <[email protected]>
(cherry picked from commit 3d077c6)

Author: tpambor

scripts/requirements-actions.in

@@ -13,7 +13,6 @@ intelhex
 junit2html
 junitparser>=4.0.1
 lxml>=5.3.0
-mock
 mypy
 natsort
 ply>=3.10