Revert "obs-outputs: Enable HDR for HEVC over RTMP"

This reverts commit 8137eb5f5680d3324088936f1d67c024663362d8.

plugins/obs-outputs/rtmp-stream.c

@@ -1375,9 +1375,8 @@ static void *connect_thread(void *data)
 		return NULL;
 	}
 
-	// HDR streaming disabled for AV1
-	if (stream->video_codec != CODEC_H264 &&
-	    stream->video_codec != CODEC_HEVC) {
+	// HDR streaming disabled for AV1 and HEVC
+	if (stream->video_codec != CODEC_H264) {
 		video_t *video = obs_get_video();
 		const struct video_output_info *info =
 			video_output_get_info(video);