Remove use of 'shallow' (react-unit-test-utils) in following components/files:

• src/courseware/course/sequence/Unit/UnitSuspense.test.jsx
• src/courseware/course/sequence/Unit/ContentIFrame.test.jsx

Remove use of 'StrictDict' (react-unit-test-utils) in following components/files:

• src/courseware/course/sequence/Unit/ContentIFrame.jsx
• src/courseware/course/sequence/Unit/constants.ts
• src/courseware/course/sequence/Unit/hooks/useExamAccess.js

Remove use of 'useKeyedState' (react-unit-test-utils) in following components/files:

• src/courseware/course/sequence/Unit/hooks/useExamAccess.js