remove trait BufferedRead from pbs-tools/src/io.rs

We do not need it.

Signed-off-by: Dietmar Maurer <dietmar@proxmox.com>

pbs-tools/src/io.rs

@@ -2,16 +2,6 @@
 
 use proxmox_sys::fd::Fd;
 
-/// The `BufferedRead` trait provides a single function
-/// `buffered_read`. It returns a reference to an internal buffer. The
-/// purpose of this traid is to avoid unnecessary data copies.
-pub trait BufferedRead {
-    /// This functions tries to fill the internal buffers, then
-    /// returns a reference to the available data. It returns an empty
-    /// buffer if `offset` points to the end of the file.
-    fn buffered_read(&mut self, offset: u64) -> Result<&[u8], anyhow::Error>;
-}
-
 /// safe wrapper for `nix::unistd::pipe2` defaulting to `O_CLOEXEC` and guarding the file
 /// descriptors.
 pub fn pipe() -> Result<(Fd, Fd), nix::Error> {