To be fair, there's lots that could be stripped from chrome bundled with electron. Nobody's really attempted that yet as far as I can tell - but I really hope we'll get there. I mean, there's hundreds of compilation options in there, for components that will never be used by a simple app.
Does your desktop app need a gyro, webrtc and gamepad support? But they're loaded anyway.
> Does your desktop app need a gyro, webrtc and gamepad support?
I doubt those impose very much (if any) overhead for just being present but unused. In any case, those aren't the things that the OP was talking about; there are plenty of layout-related standards like floats that are almost never used in modern web apps yet inhibit or prevent many optimizations that could potentially significantly increase rendering performance. For a more extreme example, imagine how much faster layout rendering could be if you removed all types of layout other than grid—you'd be able to remove a bunch of checks and all the code that handles edge cases, significantly simplifying the happy path.
Nobody (to my knowledge) has done this because it's not as simple as forking Chromium and removing code. Without the mentioned optimizations, I don't think you'd see much benefit.
Does your desktop app need a gyro, webrtc and gamepad support? But they're loaded anyway.