Remove unused variables

The code that used those was removed in
https://gerrit.wikimedia.org/r/#/c/143045/3/includes/api/ApiFlowBasePost.php

Now those vars were just sitting there

Change-Id: I49c2aa9f55c0c1393031f5882c1802fa872d98d7
Remove unused variable

Change-Id: Iac6818563b15b55a5d9f0acb3d66bc39cd4c2803
Merge "Remove unused variables"
Merge "Remove unused variable"