Revert "Merge pull request #21 from Payum/api-useraction"

This reverts commit f6aeb1c945042684f98b3a883b59f0daff353bf4, reversing
changes made to 3864b92b967f846f47062e8d98a11a4a36f64993.
Merge pull request #22 from Payum/revert-api-useraction

Revert "Merge pull request #21 from Payum/api-useraction"