Removed another FIXME

Author: Lucretiel

src/libstd/io/buffered.rs

@@ -449,12 +449,6 @@ impl<R: Seek> Seek for BufReader<R> {
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct BufWriter<W: Write> {
     inner: Option<W>,
-    // FIXME: Replace this with a VecDeque. Because VecDeque is a Ring buffer,
-    // this would enable BufWriter to operate without any interior copies.
-    // It was also allow a much simpler implementation of flush_buf. The main
-    // blocker here is that VecDeque doesn't currently have the same
-    // slice-specific specializations (extend_from_slice, `Extend`
-    // specializations)
     buf: Vec<u8>,
     // #30888: If the inner writer panics in a call to write, we don't want to
     // write the buffered data a second time in BufWriter's destructor. This