Remove a few 'setenv's from the definition.

diff -Naur bsd-games-2.17/config.params bsd-games-patch/config.params
--- bsd-games-2.17/config.params	1970-01-01 07:00:00.000000000 +0700
+++ bsd-games-patch/config.params	2020-04-22 20:49:40.809695248 +0700
@@ -0,0 +1,16 @@
+bsd_games_cfg_do_chown=n
+bsd_games_cfg_non_interactive=y
+
+# Fix some man-pages: cfscores, morse, ppt, rot13, snscore, teachgammon.
+bsd_games_cfg_use_dot_so=syml
+
+# Don't build some games:
+# Countmail require some BSD-package called `from`.
+# DM is a toy to restrict access to bsd-games.
+# Fortune seems to be already packaged (fortune-mod).
+# Wargames isn't convenient as a game launcher.
+bsd_games_cfg_no_build_dirs="countmail dm fortune wargames"
+
+# Those are substitute*'d with GNU miscfiles.
+bsd_games_cfg_hangman_wordsfile=WORD_LIST
+bsd_games_cfg_dictionary_src=WORD_LIST
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<tr><td><span title='2019-09-23 10:38:43 +0200'>2019-09-23</span></td><td><a href='/guix/commit/.dir-locals.el?id=873f6f1334ab06a69e768a8aea0054404237542f'>git: Add 'commit-difference'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-06-05 23:10:36 +0200'>2019-06-05</span></td><td><a href='/guix/commit/.dir-locals.el?id=b7178c22bf642919345095aff9e34e02c00d5762'>syscalls: Add 'with-file-lock' macro.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
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