Github user matthiasblaesing commented on the issue:
https://github.com/apache/incubator-netbeans/pull/24
When that central decision is made, there is already at least one file that
has this change already `db/external/binaries-list`. In any case the header is
not wrong. The file is part of an apache project and was thus donated by oracle
and is now covered by the apache license. If there is a consensus, that the
license header is not needed, than it can still be left in place or at that
time centrally removed. Till then I consider each file I don't have to discuss
about a good file.
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