refactor client byte write / read

src/commands/delete.rs

@@ -27,7 +27,7 @@ impl Delete {
     }
 
     pub fn parse(buf: &mut Cursor<&[u8]>) -> Result<Self> {
-        let key = buf.try_get_string()?;
+        let key = buf.try_get_short_string()?;
 
         Ok(Self { key })
     }