Here's the list of devices Apple dropped this year:
iPhone:
iPhone 6s, 6s+, SE, 7, 7+.
iPad:
iPad Air 2, iPad Mini 4.
Mac:
Macbook Pro 2016 and earlier, Macbook Air 2017 and earlier, Macbook 2016 and earlier, Mac Mini 2017 and earlier, Mac Pro 2018 and earlier, iMac Pro 2016 and earlier, iMac 2016 and earlier.
Watch:
Series 3.
iPod touch:
iPod touch 7.
iPhone:
iPhone 6s, 6s+, SE, 7, 7+.
iPad:
iPad Air 2, iPad Mini 4.
Mac:
Macbook Pro 2016 and earlier, Macbook Air 2017 and earlier, Macbook 2016 and earlier, Mac Mini 2017 and earlier, Mac Pro 2018 and earlier, iMac Pro 2016 and earlier, iMac 2016 and earlier.
Watch:
Series 3.
iPod touch:
iPod touch 7.