refactor(core): 💡 Removed unnecessary Writer

[M-Adoo]

Purpose of this Pull Request

Described in the title.

Checklist Before Merging

Please ensure the following are completed before merging:

• If this is linked to an issue, include the link in your description.
• If you've made changes to the code or documentation, make sure these are updated in the CHANGELOG.md file.
• If you've introduced any break changes, briefly describe them in the Breaking section of the CHANGELOG.md file.

Additional Information

The bot will replace #pr in CHANGELOG.md with your pull request number. If your branch is out of sync, use git pull --rebase to update it.

If you're unsure about which branch to submit your Pull Request to, or when it will be released after being merged, please refer to our Release Guide.

If you're working on a widget and need help writing test cases, we have some macros that can assist you. Please refer to the Ribir Dev Helper documentation.

[codecov]

Codecov Report

Attention: Patch coverage is 77.77778% with 2 lines in your changes missing coverage. Please review.

Project coverage is 83.47%. Comparing base (5803a76) to head (ab9d5a3).
Report is 8 commits behind head on master.

Files	Patch %	Lines
core/src/animation/stagger.rs	75.00%	1 Missing ⚠️
core/src/animation/transition.rs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #615      +/-   ##
==========================================
- Coverage   84.02%   83.47%   -0.55%     
==========================================
  Files         185      185              
  Lines       25420    25585     +165     
==========================================
- Hits        21359    21358       -1     
- Misses       4061     4227     +166     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.