refactor: remove unused crop resize image from file function

[mwbrooks]

Changelog

N/A - internal cleanup with no user-facing changes.

Summary

This pull request removes the unused CropResizeImageRatioFromFile function found with the Go deadcode tool.

• Removes CropResizeImageRatioFromFile from internal/image/image.go
• Removes its unit tests from internal/image/image_test.go
• CropResizeImageRatioFromFileToBytes is unchanged and still used for app icons
• Follows refactor: remove unused resize image functions #690, which removes the unused ResizeImage* functions

Preview

N/A

Testing

1. Run go run golang.org/x/tools/cmd/deadcode@latest ./... | grep internal/image and confirm CropResizeImageRatioFromFile is no longer listed
2. Run grep -rn "CropResizeImageRatioFromFile(" --include='*.go' . and confirm no references remain

Notes

The ResizeImage* functions still appear in deadcode output on this branch until #690 merges.

Requirements

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.21%. Comparing base (24242de) to head (8df1763).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #691      +/-   ##
==========================================
- Coverage   78.23%   78.21%   -0.02%     
==========================================
  Files         239      239              
  Lines       18149    18144       -5     
==========================================
- Hits        14199    14192       -7     
- Misses       3950     3952       +2     

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[zimeg]

🪓 @mwbrooks LGTM less code is better in this case so we can merge this whenever.

[mwbrooks]

Thanks for the quick review @zimeg! 🙇🏻