What is ScriptEditor2? It appears in my usage report in Settings as having 0.4KB of Documents and Data, but I've never installed anything by that name. It doesn't appear as an app on my home screen, and a Spotlight search turns up nothing. For that matter, a Google search turns up nothing. What the heck is it?
com.apple.ScriptEditor2 is the CFBundleIdentifier for AppleScript Editor.app.

The 0.4KB of iCloud data associated with ScriptEditor2 is likely to be a shared preference file created by AppleScript Editor on your Mac.