Revert "Temporary unlock gate tests for salt formulas"

This reverts commit 8407afd5499eb9b942a4079bf289ebb796c12708.

Reason for revert: No more needed
PROD-35466

Change-Id: I1fb88ac718124e3207ca48daadfb6007eb526c73
diff --git a/test-salt-formulas-env.groovy b/test-salt-formulas-env.groovy
index 19079b5..de631bf 100644
--- a/test-salt-formulas-env.groovy
+++ b/test-salt-formulas-env.groovy
@@ -37,7 +37,7 @@
 
 throttle(['test-formula']) {
   timeout(time: 1, unit: 'HOURS') {
-    node("old16.04") {
+    node("python&&docker") {
       try {
         stage("checkout") {
           if (defaultGitRef && defaultGitUrl) {