patch: games/prboom does not depend on audio/timidity

#?patch
#
# This patch removes the useless RUN_DEPEND of games/prboom on
# audio/timidity.
#
# Me understands that this was put in to force installation of a patch
# set; bare prboom certainly doesn't support real, "external" timidity.
# The "timidity" that is supported is an outdated copy that is part of
# SDL (it barfs on modern patch sets that timidity(1) will happily
# accept).
#
# Let's leave it up to the operator to decide what patch set to use,
# shall we?
#
# --zeurkous, Mon Oct 26 12:29:18 UTC 2020.
#
--- ports/games/prboom/..ar/0/Makefile Mon Jul 15 22:57:58 2019
+++ ports/games/prboom/Makefile Mon Oct 26 12:00:28 2020
@@ -15,8 +15,6 @@

WANTLIB = SDL c m pthread GL GLU SDL_mixer>=3 SDL_net>=1 png>=4

-RUN_DEPENDS = audio/timidity
-
LIB_DEPENDS = devel/sdl-mixer \
devel/sdl-net \
graphics/png