## Description
the exchangeService struct is a vestigial prop
from before we had centralized around the
graph.Service, and is no longer needed. These
changes will cascade into the migration of
graph client usage into an api package for mocking.
## Does this PR need a docs update or release note?
- [x] ⛔ No
## Type of change
- [x] 🐹 Trivial/Minor
## Issue(s)
* #1967
## Test Plan
- [x] ⚡ Unit test
- [x] 💚 E2E
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