remove unused variable

Author: yeoleobun

src/media/mod.rs

@@ -699,7 +699,6 @@ pub(crate) struct FileTrackPlaybackSource {
     audio_source_manager: Arc<audio_source::AudioSourceManager>,
     encoder: Box<dyn audio_codec::Encoder>,
     codec_info: negotiate::CodecInfo,
-    samples_per_frame: usize,
     rtp_ticks_per_frame: u32,
     rtp_timestamp: u32,
     sequence_number: u16,
@@ -963,7 +962,6 @@ impl FileTrack {
             audio_source_manager,
             encoder: audio_codec::create_encoder(selected.codec),
             codec_info: selected,
-            samples_per_frame: frame_timing.pcm_samples_per_frame,
             rtp_ticks_per_frame: frame_timing.rtp_ticks_per_frame,
             rtp_timestamp: rand::random(),
             sequence_number: rand::random(),