avformat/Makefile: Remove false dependencies of WebM and Matroska muxer

These muxers don't depend on the WebM Chunk or the WebM DASH Manifest
muxers.

Furthermore, remove some #if checks in webm_chunk.c and webmdashenc.c.
They are always true now that webm_chunk.c and webmdashenc.c are only
compiled when their corresponding muxers are enabled.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

libavformat/Makefile

@@ -300,8 +300,8 @@ OBJS-$(CONFIG_MATROSKA_DEMUXER)          += matroskadec.o matroska.o  \
                                             flac_picture.o replaygain.o
 OBJS-$(CONFIG_MATROSKA_MUXER)            += matroskaenc.o matroska.o \
                                             av1.o avc.o hevc.o \
-                                            flacenc_header.o avlanguage.o vorbiscomment.o wv.o \
-                                            webmdashenc.o webm_chunk.o
+                                            flacenc_header.o avlanguage.o \
+                                            vorbiscomment.o wv.o
 OBJS-$(CONFIG_MD5_MUXER)                 += hashenc.o
 OBJS-$(CONFIG_MGSTS_DEMUXER)             += mgsts.o
 OBJS-$(CONFIG_MICRODVD_DEMUXER)          += microdvddec.o subtitles.o
@@ -552,8 +552,7 @@ OBJS-$(CONFIG_WC3_DEMUXER)               += wc3movie.o
 OBJS-$(CONFIG_WEBM_MUXER)                += matroskaenc.o matroska.o \
                                             av1.o avc.o hevc.o \
                                             flacenc_header.o avlanguage.o \
-                                            wv.o vorbiscomment.o \
-                                            webmdashenc.o webm_chunk.o
+                                            wv.o vorbiscomment.o
 OBJS-$(CONFIG_WEBM_DASH_MANIFEST_MUXER)  += webmdashenc.o
 OBJS-$(CONFIG_WEBM_CHUNK_MUXER)          += webm_chunk.o
 OBJS-$(CONFIG_WEBP_MUXER)                += webpenc.o

libavformat/webm_chunk.c

@@ -284,7 +284,6 @@ static const AVOption options[] = {
     { NULL },
 };
 
-#if CONFIG_WEBM_CHUNK_MUXER
 static const AVClass webm_chunk_class = {
     .class_name = "WebM Chunk Muxer",
     .item_name  = av_default_item_name,
@@ -307,4 +306,3 @@ AVOutputFormat ff_webm_chunk_muxer = {
     .deinit         = webm_chunk_deinit,
     .priv_class     = &webm_chunk_class,
 };
-#endif

libavformat/webmdashenc.c

@@ -559,7 +559,6 @@ static const AVOption options[] = {
     { NULL },
 };
 
-#if CONFIG_WEBM_DASH_MANIFEST_MUXER
 static const AVClass webm_dash_class = {
     .class_name = "WebM DASH Manifest muxer",
     .item_name  = av_default_item_name,
@@ -577,4 +576,3 @@ AVOutputFormat ff_webm_dash_manifest_muxer = {
     .write_packet      = webm_dash_manifest_write_packet,
     .priv_class        = &webm_dash_class,
 };
-#endif