Karl was previously duplicating the NOTICE file in Main so that it would end up in the generated source JAR for release. This is error prone since we have to remember to edit it in two places and it is the only subproject with this issue, likely because it is the only subproject that needs to copy stuff around. We need to come up with a solution that allows us to only have one copy of the NOTICE file.
I have deleted the duplicated NOTICE file in src/main/resources/ for now, but this means there will be no NOTICE file in the source JAR. So we need to fix this before the next release.