The wonderful thing about Google is that they don't officially release their ROMs for you to flash. You can boot into recovery and wipe all the data, but you can flash CyanogenMod that removes a lot of bloatware that came from your device.
https://download.cyanogenmod.org/?device=vs985
Here's a bit about Cyanogen.
http://www.cyanogenmod.org/
I think your device is officially supported (didn't bother to check), but judgement tells me that since they're hosting an official build for your device, it should be official. Also, you can just get it by going to
get.cm on your browser and phone and following said instructions.
You're lucky because your model seems to be supported officially. Unlike mine, which I had to manually flash everything to.