It's a compatibility file when using GeneratePress, yes, and it is currently empty.
I'm guessing that it was included at some point in the past (with content) because it was needed, was no longer needed because of some update either by GP or by Toolset, and was retained in case it is needed again.
It's causing a console warning when used with your CDN but otherwise has no effect.
I've pointed it out to the developers to be reviewed, but there's nothing you need to do.
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