Remove double declaration of 2 conversion functions.

The declaration in common_types.h is probably a left-over from a
previous cleanup.

Bug: None
Change-Id: I3ee1bad2494ede0022c6aa8fdd106035471d50e2
Reviewed-on: https://webrtc-review.googlesource.com/99220
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24666}

common_types.h

@@ -342,10 +342,6 @@ enum VideoCodecType {
   kVideoCodecMultiplex,
 };
 
-// Translates from name of codec to codec type and vice versa.
-const char* CodecTypeToPayloadString(VideoCodecType type);
-VideoCodecType PayloadStringToCodecType(const std::string& name);
-
 struct SpatialLayer {
   bool operator==(const SpatialLayer& other) const;
   bool operator!=(const SpatialLayer& other) const { return !(*this == other); }

media/engine/webrtcvideodecoderfactory.cc

@@ -10,6 +10,8 @@
 
 #include "media/engine/webrtcvideodecoderfactory.h"
 
+#include "api/video_codecs/video_codec.h"
+
 namespace cricket {
 
 webrtc::VideoDecoder* WebRtcVideoDecoderFactory::CreateVideoDecoderWithParams(

modules/video_coding/utility/ivf_file_writer.cc

@@ -13,6 +13,7 @@
 #include <string>
 #include <utility>
 
+#include "api/video_codecs/video_codec.h"
 #include "modules/rtp_rtcp/source/byte_io.h"
 #include "rtc_base/checks.h"
 #include "rtc_base/logging.h"