Remove WWW entries moved into port Makefiles
Commit b7f05445c00f has added WWW entries to port Makefiles based on
WWW: lines in pkg-descr files.
This commit removes the WWW: lines of moved-over URLs from these
pkg-descr files.
Approved by: portmgr (tcberner)
New port: archivers/py-zstandard: Zstandard bindings for Python, a full-featured
version
Submitted by: myself
Approved by: tcberner (mentor)
Differential Revision: https://reviews.freebsd.org/D13824