diff --git a/src/number.rs b/src/number.rs
index 776e432..5d1692a 100644
--- a/src/number.rs
+++ b/src/number.rs
@@ -1,5 +1,3 @@
-use std::{u8, u16, u32, u64, usize};
-use std::{i8, i16, i32, i64, isize};
 use std::cmp::PartialEq;
 use std::mem::size_of;
 use std::num::{Zero, One};
@@ -18,10 +16,6 @@ pub trait Number : Zero + One + Add<Output=Self> + Sub<Output=Self> +
    type StrRadixError;
 
 
-   /// The amount of Bytes required to represent this Number.
-   const BYTES: usize;
-
-
    /// Create a number from a given string and base radix.
    ///
    ///```
@@ -757,9 +751,6 @@ macro_rules! int_number_trait_impl
          type StrRadixError = ::std::num::ParseIntError;
 
 
-         const BYTES: usize = <$varType>::BYTES;
-
-
          fn from_str_radix(src: &str, radix: u32) ->
             Result<Self, ::std::num::ParseIntError>
          {
@@ -780,9 +771,6 @@ macro_rules! float_number_trait_impl
          type StrRadixError = ::std::num::ParseFloatError;
 
 
-         const BYTES: usize = $numBytes;
-
-
          fn from_str_radix(src: &str, radix: u32) ->
             Result<Self, ::std::num::ParseFloatError>
          {