Don't add the distfile twice.
This fixes a fetch error:
=> numpy-numpy-v1.13.1_GH0.tar.gz doesn't seem to exist in /portdistfiles/. => Attempting to fetch https://codeload.github.com/numpy/numpy/tar.gz/v1.13.1?dummy=/numpy-numpy-v1.13.1_GH0.tar.gz fetch: 4336552: No such file or directory numpy-numpy-v1.13.1_GH0.tar.gz 0 B 0 Bps => Attempting to fetch http://distcache.FreeBSD.org/ports-distfiles/numpy-numpy-v1.13.1_GH0.tar.gz fetch: 4336552: No such file or directory => Couldn't fetch it - please try to retrieve this => port manually into /portdistfiles/ and try again.
Sponsored by: Absolight