The file is in https://wiki.yoctoproject.org/wiki/File:Toasterconf.json.txt.patch
The new version of the file is at https://wiki.yoctoproject.org/wiki/File:Toasterconf.json.txt.patch
Verified that the hosted-toasterconf.json file is available and properly importing into Toaster.
Verified on master: 5c76cebc24675edb3dff473fce9b67cedff615db