Steps to reproduce:
1. Open the attached user project "anim2d.zip"
2. Click "Build -> Build Bundles" at the top menu
3. Using the Package Manager remove the 2D Animation package
4. Click Build -> Build Bundles
5. Navigate to and open "<ProjectFolder>/Bundles/<Platorm>/1"
6. Use WebExtract and binary2text (Located in the root Editor folder under Data/Tools) on bundle <ProjectFolder>/Bundles/<Platorm>/1/Piggy_<somehash> to get human readable bundle data
7. Repeat step 6 on <ProjectFolder>/Bundles/<Platorm>/2/Piggy_<somehash>
8. Diff the extracted contents of build 1 and 2 (See attached Results.png)

Expected results: the contents are identical
Actual results: adding the 2d animation package adds BoneWeight data to every Sprite in an AssetBundle even if that Sprite has no bones

Reproducible with: 2D animation 7.0.11 - 10.0.2 (2021.3.30f1, 2022.3.8f1, 2023.1.10f1, 2023.2.0b7, 2023.3.0a3)

Reproducible on: Windows 10 2H22
Not reproducible on: No other environment tested

Notes:
-When the 2DAnimation package is imported into a project, it changes the artifacts given the postprocessor defined in \com.unity.2d.animation@9.0.3\Editor\SpritePostProcess.cs