chore: remove deprecated schedule model, views, page, ...etc

[mattwang44]

Types of changes

• [ ] Bugfix
• [ ] New feature
• [x] Refactoring
• [ ] Breaking change (any change that would cause existing functionality to not work as expected)
• [ ] Documentation Update
• [ ] Other (please describe)

Description

Before 2021, we used to have a schedule model storing the generated HTML code of schedule data, and being displayed on the schedule page. However, this behavior has been deprecated after we created the brand new front-end project in 2021.

Note that I only deleted/modified templates and statics from the 2023 code.

Steps to Test This Pull Request

• Go to django admin
• Should not see schedule model

Expected behavior

• All currently active behavior should remain unaffected.
• Deprecated schedule-related behaviors are not functioning anymore.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 66.66667% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 73.16%. Comparing base (fca6fd2) to head (134b60e). Report is 1 commits behind head on master.

Files	Patch %	Lines
src/events/views.py	0.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1132 +/- ## ========================================== + Coverage 71.19% 73.16% +1.96% ========================================== Files 84 83 -1 Lines 3451 3115 -336 ========================================== - Hits 2457 2279 -178 + Misses 994 836 -158 ```

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[mattwang44]

@erik1110 any progress here?

[mattwang44]

rebased

[mattwang44]

Please let me know if this refactoring PR is either unwanted or still wanted. I wouldn't take any further action for now as it has been forgotten for quite a long time....

[mattwang44]

rebased