Remove unused imports detected by ESLint

[jsharkey13]

No description provided.

[jsharkey13]

I can't approve my own PR, but I have manually checked all 34 files now. There are some minor tailing-whitespaces changes since my IDE also trims that on saving.

[codecov]

Codecov Report

Attention: Patch coverage is 74.60317% with 16 lines in your changes missing coverage. Please review.

Project coverage is 36.61%. Comparing base (88d0cd7) to head (2c822ce).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
.../components/elements/panels/TeacherConnections.tsx	60.00%	3 Missing and 1 partial ⚠️
...pp/components/content/IsaacLLMFreeTextQuestion.tsx	0.00%	3 Missing ⚠️
...p/components/elements/inputs/UserContextPicker.tsx	50.00%	2 Missing ⚠️
src/app/components/pages/Groups.tsx	50.00%	2 Missing ⚠️
...nents/elements/LLMFreeTextQuestionFeedbackView.tsx	85.71%	1 Missing ⚠️
src/app/components/pages/AssignmentProgress.tsx	66.66%	1 Missing ⚠️
...rc/app/components/pages/RegistrationSetDetails.tsx	80.00%	1 Missing ⚠️
src/app/state/middleware/notificationManager.ts	0.00%	1 Missing ⚠️
src/test/pages/Homepage.cy.tsx	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1240   +/-   ##
=======================================
  Coverage   36.61%   36.61%           
=======================================
  Files         451      451           
  Lines       19768    19768           
  Branches     6496     6481   -15     
=======================================
  Hits         7239     7239           
  Misses      11884    11884           
  Partials      645      645           

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