chore(SQO): Remove unused module/test file. (#6)

* Update README.md

* Remove subgraph data access provider. (currently unused module & tests)

Author: MoonBoi9001

README.md

@@ -128,7 +128,6 @@ bandit -r src/
 ## TODO List (only outstanding TODOs)
 
 ### 1. Testing
-- [ ] Create unit tests for all components
 - [ ] Create integration tests for the entire pipeline
 - [ ] Security review of code and dependencies