Last year, it was reported that Google was working on what was called Project Campfire, a feature which would have allowed Chromebook users to run Windows 10 on their machine and switch between it and Chrome OS at will. The feature would have been named Alt OS, according to the reports, and require as much as 40GB of storage to enable dual boot.
Now, changes in the Chromium Gerritt, spotted by Reddit user crosfrog (via About Chromebooks), indicate that the feature has been deprecated from Chrome OS. This is, naturally, a strong indication that Google has no intention of moving forward with the feature, and that shouldn't be entirely surprising.
Beyond the relatively high system requirements, not much has been heard in regards to the project for quite some time. After first being discovered in August of last year, another report in October suggested that the feature might come with Google's Pixel Slate, but that didn't come to pass. Google also held its I/O developer conference last week, with no sort of mention of this capability.
Of course, this isn't really a cancellation, since the feature was never formally announced in the first place. Still, if you had your hopes up for this capability, it's probably time to accept that it won't happen.