Revert "[MM-41576] Revamp database schema version (#19586)" (#19746)

* Revert "[MM-41576] Revamp database schema version (#19586)"

This reverts commit 645fee3fe3.

* Revert "MM-42049 - license endpoint not working (#19686)"

This reverts commit 4fe89e5847.

api4/system_test.go

@@ -909,20 +909,3 @@ func TestCompleteOnboarding(t *testing.T) {
 
 	})
 }
-
-func TestGetAppliedSchemaMigrations(t *testing.T) {
-	th := Setup(t)
-	defer th.TearDown()
-
-	t.Run("as a regular user", func(t *testing.T) {
-		_, resp, err := th.Client.GetAppliedSchemaMigrations()
-		require.Error(t, err)
-		CheckForbiddenStatus(t, resp)
-	})
-
-	th.TestForSystemAdminAndLocal(t, func(t *testing.T, c *model.Client4) {
-		_, resp, err := c.GetAppliedSchemaMigrations()
-		require.NoError(t, err)
-		CheckOKStatus(t, resp)
-	})
-}