I recently tried to remove the Google search bar on my homescreen using this tutorial by disabling the Google Search app in settings. It turns out I was using the Google Now launcher, and so when I rebooted the launcher broke and sent me into some kind of recovery mode (not the proper android recovery mode.) It went through the booting animation, but then just came up with an alert saying 'Optimising Apps: 1/150', which cycled through each app and 'optimised' it. Upon completion, a black screen came up and the phone rebooted itself.
I'm using an unrooted Moto G2 which had Marshmallow running on it. I'm wondering how to reinstall my OS or otherwise restore my device; I don't care about data as it is backed up.
Any ideas how to fix/reinstall my Android installation?