リノート解除時もとのノートを削除しないように

[4ster1sk]

Fix: #646

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 71.42857% with 8 lines in your changes missing coverage. Please review.

Project coverage is 27.73%. Comparing base (6955662) to head (40b1caf).
Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
lib/view/note_modal_sheet/note_modal_sheet.dart	71.42%	8 Missing ⚠️

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Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #668      +/-   ##
===========================================
+ Coverage    27.69%   27.73%   +0.03%     
===========================================
  Files          312      312              
  Lines        16253    16266      +13     
===========================================
+ Hits          4501     4511      +10     
- Misses       11752    11755       +3     

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[shiosyakeyakini-info]

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