message: remove unused buffer
diff: @@ -20,7 +20,6 @@ pub struct StoreWriter {
  compressor: Compressor,
  block_size: usize,
  num_docs_in_current_block: DocId,
  - intermediary_buffer: Vec<u8>,
  current_block: Vec<u8>,
  doc_pos: Vec<u32>,
  block_compressor: BlockCompressor,
  @@ -42,7 +41,6 @@ impl StoreWriter {
  compressor,
  block_size,
  num_docs_in_current_block: 0,
  - intermediary_buffer: Vec::new(),
  doc_pos: Vec::new(),
  current_block: Vec::new(),
  block_compressor,
  @@ -55,9 +53,7 @@ impl StoreWriter {
  /// The memory used (inclusive childs)
  pub fn mem_usage(&self) -> usize {
  - self.intermediary_buffer.capacity()
  - + self.current_block.capacity()
  - + self.doc_pos.capacity() * std::mem::size_of::<u32>()
  + self.current_block.capacity() + self.doc_pos.capacity() * std::mem::size_of::<u32>()
  }
  /// Checks if the current block is full, and if so, compresses and flushes it.
  