chore(sponsor): remove sponsor-related deprecated code

[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

remove deprecated sponsor-related code

Note that I only modified/deleted those templates and static from 2023 code.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 73.99%. Comparing base (134b60e) to head (0303af9).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## rm-schedule-model-and-views #1133 +/- ## =============================================================== + Coverage 73.16% 73.99% +0.83% =============================================================== Files 83 81 -2 Lines 3115 3057 -58 =============================================================== - Hits 2279 2262 -17 + Misses 836 795 -41 ```

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[mattwang44]

@Ritabear please review the unit tests of sponsor API

[mattwang44]

@SivanYeh @erik1110 please join as the reviewer for the unit test part, thanks!

[mattwang44]

@erik1110 @SivanYeh any progress here?

[erik1110]

@erik1110 @SivanYeh any progress here? "I have set up the environment and am currently researching how to write test examples. I have left some questions in the discussion thread."

[SivanYeh]

@erik1110 @SivanYeh any progress here? @mattwang44 Same as Erik. Yet Josix may assign it to other member because of the approaching due. I would continue reading codes and asking.

[mattwang44]

will rebase again after #1132 is merged

[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....

[SivanYeh]

@mattwang44 LGTM. I will resolve the conflix and create a new PR on src/templates/pycontw-2024 with similar redundancy

[mattwang44]

rebased