Rip out all the optional dependencies.

Index: make/include/main.defs
--- make/include/main.defs.orig
+++ make/include/main.defs
@@ -7,97 +7,6 @@ include $(SRC/)make/include/tool.defs
 
 ###############################################################################
 
-ifneq (,$(filter $(HOST.system),cygwin mingw))
-ifneq ($(HAS.bz2),1)
-    MODULES += contrib/bzip2
-endif
-endif
-
-ifneq (,$(filter $(HOST.system),darwin cygwin mingw))
-    MODULES += contrib/freetype
-    MODULES += contrib/fribidi
-    MODULES += contrib/harfbuzz
-    MODULES += contrib/libxml2
-    MODULES += contrib/libass
-    MODULES += contrib/libogg
-    MODULES += contrib/libvorbis
-    MODULES += contrib/libopus
-    MODULES += contrib/libspeex
-    MODULES += contrib/libtheora
-    MODULES += contrib/lame
-    MODULES += contrib/x264
-    MODULES += contrib/jansson
-    MODULES += contrib/libvpx
-    MODULES += contrib/libjpeg-turbo
-endif
-
-ifeq (1,$(FEATURE.flatpak))
-    MODULES += contrib/libass
-    MODULES += contrib/jansson
-    MODULES += contrib/x264
-endif
-
-ifeq (1,$(FEATURE.fdk_aac))
-    MODULES += contrib/fdk-aac
-endif
-
-ifeq (1,$(FEATURE.x265))
-    MODULES += contrib/x265
-    MODULES += contrib/x265_8bit
-    MODULES += contrib/x265_10bit
-    MODULES += contrib/x265_12bit
-endif
-
-MODULES += contrib/libdav1d
-MODULES += contrib/svt-av1
-MODULES += contrib/zimg
-MODULES += contrib/ffmpeg
-MODULES += contrib/libdvdread
-MODULES += contrib/libdvdnav
-MODULES += contrib/libbluray
-
-ifeq (1,$(FEATURE.qsv))
-ifeq (,$(filter $(HOST.system),freebsd))
-    MODULES += contrib/libvpl
-endif
-endif
-
-ifeq (1,$(FEATURE.vce))
-    MODULES += contrib/amf
-endif
-
-ifeq (1,$(FEATURE.nvenc))
-    MODULES += contrib/nvenc
-endif
-
-ifneq (,$(filter $(HOST.system),darwin))
-    MODULES += contrib/xz
-endif
-
-ifneq (,$(filter $(HOST.machine),arm64 aarch64))
-    MODULES += contrib/sse2neon
-endif
-
-ifneq (,$(filter $(HOST.system),cygwin mingw))
-ifneq ($(HAS.iconv),1)
-    MODULES += contrib/libiconv
-endif
-ifneq ($(HAS.xz),1)
-    MODULES += contrib/xz
-endif
-ifneq ($(HAS.libz),1)
-    MODULES += contrib/zlib
-endif
-ifneq ($(HAS.regex),1)
-    MODULES += contrib/libgnurx
-endif
-endif
-
-ifneq (,$(filter $(HOST.system),solaris))
-    MODULES += contrib/libiconv
-endif
-
-
 ## these must come after contrib since some contrib modules are optional
 MODULES += libhb
 
