remove unused Buf implementation. (#449)

The implementation of `Buf` for `Option<[u8; 1]>` was added to support
`IntoBuf`. The `IntoBuf` trait has since been removed.

Closes #444

1 files changed, 0 insertions, 1 deletions

diff --git a/benches/buf.rs b/benches/buf.rs
index 77b0633..4b5d286 100644
--- a/benches/buf.rs
+++ b/benches/buf.rs
@@ -159,7 +159,6 @@ macro_rules! bench_group {
 mod get_u8 {
     use super::*;
     bench_group!(get_u8);
-    bench!(option, option);
 }
 mod get_u16 {
     use super::*;