If `--ios_simulator_device` is not specified, the value defaults to iPhone 6s Plus, which is not useful as of 2025.

[bc-lee]

Context: google/google-toolbox-for-mac#539

Although the code in https://github.com/google/google-toolbox-for-mac/actions/runs/17138256361/job/48622207526 suggests:

device_type = ctx.attr.device_type or ctx.fragments.objc.ios_simulator_device or "iPhone 15"

In practice, the value of device_type falls back to iPhone 6s Plus when --ios_simulator_device is not specified. Since the iPhone 6s Plus is a very old device, we generally don’t expect its iOS Simulator runtime to be installed anymore.

I’m curious where this default of iPhone 6s Plus originates, and it would be better to replace it with a more reasonable default rather than such an outdated choice.