Cleanup salt remains

Remove 2 now unused builders since salt was retired.

Change-Id: Ie3dbbde96751ed52edb4b397d606d550e9d71f28

jenkins/jobs/macros.yaml

@@ -646,22 +646,6 @@
           #!/bin/bash -xe
           ansible-lint **/*.yml
 
-- builder:
-    name: salt-check-commit
-    builders:
-      - shell: |
-          #!/bin/bash -xe
-          scripts/gate-check-commit.sh
-
-- builder:
-    name: salt-formula-test
-    builders:
-      - shell: |
-          #!/bin/bash -xe
-          [[ $SALT_VERSION == "latest" ]] && export SALT_VERSION=""
-          cd tests
-          ./run_tests.sh
-
 - builder:
     name: ruby-191-prep
     builders: