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)

Add WWW entries to port Makefiles

It has been common practice to have one or more URLs at the end of the
ports' pkg-descr files, one per line and prefixed with "WWW:". These
URLs should point at a project website or other relevant resources.

Access to these URLs required processing of the pkg-descr files, and
they have often become stale over time. If more than one such URL was
present in a pkg-descr file, only the first one was tarnsfered into
the port INDEX, but for many ports only the last line did contain the
port specific URL to further information.

There have been several proposals to make a project URL available as
a macro in the ports' Makefiles, over time.

editors/vim-colorschemes-legacy: Remove RUN_DEPENDS, change install dir

As noted by cy, setting RUN_DEPENDS=vim means that any other vim flavor
gets uninstalled when this port is installed. Nothing in this port
actually depends on Vim at all; it should work equally well for Neovim
or any Vim flavor. It makes most sense to just drop the RUN_DEPENDS
altogether.

While here, change the install dir to PREFIX/share/vim/vimfiles. The
previous dir, .../vim/vim90, is the private runtime library, and
vimfiles has over time become the site extension to the runtime library.

editors/vim-colorschemes-legacy: Add port

Upstream vim modernized their colorschemes, which is a good thing.
However, the look of them has changed, which is jarring at best for
users used to the original look.

Upstream colorscheme development was split into a new repo, and the
original colorschemes were imported there. This port installs those
colorschemes.

The rest of that repo are the colorschemes included in vim, so there's
not really any benefit to packaging anything else from it.

PR:		265798