(Case 1155776) AssetBundle pulls-in editor assets

I have a C# script that uses a script editor icon, as described here:
https://docs.unity3d.com/Manual/AssigningIcons.html

This script is then attached to a GameObject and the GameObject is part of a scene. When I mark the scene to be stored in an asset bundle, Unity also pulls in the editor script icon.

Spoiler: Screenshot

Reproduce

• Open user project
• Select "MyScript.cs" and notice it uses a custom icon
• Open Window > AssetBundle Browser
• Select "scenes_samplescene" in AssetBundle Browser

Actual
Observe "myscript icon.png" is pulled into the asset bundle "scenes_samplescene", even though this icon is used inside the editor only.

Expected
Editor assets should not get pulled into asset bundles for the player.