contribs: remove d2d headers package

Close #16968

contrib/src/dshow/rules.mak

 # DirectX headers, missing from mingw32
 
 DSHOW_HEADERS_URL := $(CONTRIB_VIDEOLAN)/dshow-headers-oss.tar.bz2
-D2D_HASH := b1affb70c021200b410eccd377ad5aeef2c5a85b
-D2D_URL := http://github.com/2of1/d2d1headers/archive/master.zip
-# FIXME: ^ D2D not working
 
 ifdef HAVE_WIN32
 ifndef HAVE_MINGW_W64
@@ -14,10 +11,7 @@ endif
 $(TARBALLS)/dshow-headers-oss.tar.bz2:
 	$(call download,$(DSHOW_HEADERS_URL))
 
-$(TARBALLS)/d2d_headers.zip:
-	$(call download,$(D2D_URL))
-
-DSHOW_SOURCES := dshow-headers-oss.tar.bz2 d2d_headers.zip
+DSHOW_SOURCES := dshow-headers-oss.tar.bz2
 
 .sum-dshow: $(DSHOW_SOURCES)
 
@@ -25,5 +19,4 @@ DSHOW_SOURCES := dshow-headers-oss.tar.bz2 d2d_headers.zip
 	mkdir -p -- "$(PREFIX)/include"
 	tar xjf $< -C "$(PREFIX)/include" \
 		--wildcards --no-anchored '*.h' --strip-components=1
-	unzip -jf $(TARBALLS)/d2d_headers.zip -d "$(PREFIX)/include"
 	touch $@