rm obsolete links

Remove links to [removed](hemanth@4f869c8) TODO sections:

* Guarded Functions
* Traversable

Author: chocolateboy

readme.md

@@ -30,7 +30,6 @@ __Table of Contents__
 * [Point-Free Style](#point-free-style)
 * [Predicate](#predicate)
 * [Contracts](#contracts)
-* [Guarded Functions](#guarded-functions)
 * [Category](#category)
 * [Value](#value)
 * [Constant](#constant)
@@ -52,7 +51,6 @@ __Table of Contents__
 * [Setoid](#setoid)
 * [Semigroup](#semigroup)
 * [Foldable](#foldable)
-* [Traversable](#traversable)
 * [Type Signatures](#type-signatures)
 * [Algebraic data type](#algebraic-data-type)
   * [Sum type](#sum-type)