R1:587faa6f677c

Remove some defunct old-style transaction policy checks

Summary:
Ref PHI193. This method of enforcing policy checks is now (mostly) obsolete, and they're generally checked at the Controller/API level instead.

Notably, this method does not call `adjustObjectForPolicyChecks(...)` properly, so it can not handle special cases like "creating a project and taking its newly created members into account" for object policies like "Project Members".

Just remove these checks, which are redundant with checks…