message: Rafs: remove a trace! which is too verbose
  disk_inode() is called too frequently and floods into logs when
  log_level is "trace".
diff: @@ -344,9 +344,7 @@ pub struct OndiskInodeWrapper {
  impl OndiskInodeWrapper {
  fn disk_inode(&self) -> &dyn RafsV6OndiskInode {
  - let i = self.mapping.disk_inode(self.offset);
  - trace!("erofs disk inode loaded nid={} {:?}", i.ino(), i);
  - i
  + self.mapping.disk_inode(self.offset)
  }
  fn blocks_count(&self) -> u64 {
  