Remove redundant steps from .gitlab-ci-yml configs

scripts/prepare_build.sh already does it

.gitlab-ci.yml

@@ -354,8 +354,6 @@ migration paths:
   script:
     - git fetch origin v8.5.9
     - git checkout -f FETCH_HEAD
-    - cp config/resque.yml.example config/resque.yml
-    - sed -i 's/localhost/redis/g' config/resque.yml
     - bundle install --without postgres production --jobs $(nproc) $FLAGS --retry=3
     - bundle exec rake db:drop db:create db:schema:load db:seed_fu
     - git checkout $CI_COMMIT_SHA