diff --git a/collections/orderedintset.go b/collections/orderedintset.go
deleted file mode 100644
index 7442f2e..0000000
--- a/collections/orderedintset.go
+++ /dev/null
@@ -1,95 +0,0 @@
-package collections
-
-import (
-	"sort"
-	"sync"
-)
-
-// OrderedIntSet is a thread-safe sorted set and a stack.
-type OrderedIntSet struct {
-	sync.Mutex
-	set []int
-}
-
-// NewOrderedSet returns an initialized OrderedSet
-func NewOrderedIntSet() *OrderedIntSet {
-	return &OrderedIntSet{}
-}
-
-// Push takes an int and adds it to the set. If the elem aready exists, it has no effect.
-func (s *OrderedIntSet) Push(elem int) {
-	s.Lock()
-	if len(s.set) == 0 {
-		s.set = append(s.set, elem)
-		s.Unlock()
-		return
-	}
-
-	// Make sure the list is always sorted
-	i := sort.SearchInts(s.set, elem)
-	if i < len(s.set) && s.set[i] == elem {
-		s.Unlock()
-		return
-	}
-	s.set = append(s.set[:i], append([]int{elem}, s.set[i:]...)...)
-	s.Unlock()
-}
-
-// Pop is an alias to PopFront()
-func (s *OrderedIntSet) Pop() int {
-	return s.PopFront()
-}
-
-// Pop returns the first element from the list and removes it.
-// If the list is empty, it returns 0
-func (s *OrderedIntSet) PopFront() int {
-	s.Lock()
-	if len(s.set) == 0 {
-		s.Unlock()
-		return 0
-	}
-	ret := s.set[0]
-	s.set = s.set[1:]
-	s.Unlock()
-	return ret
-}
-
-// PullBack retrieve the last element of the list.
-// The element is not removed.
-// If the list is empty, an empty element is returned.
-func (s *OrderedIntSet) PullBack() int {
-	s.Lock()
-	defer s.Unlock()
-	if len(s.set) == 0 {
-		return 0
-	}
-	return s.set[len(s.set)-1]
-}
-
-// Exists checks if the given element present in the list.
-func (s *OrderedIntSet) Exists(elem int) bool {
-	s.Lock()
-	if len(s.set) == 0 {
-		s.Unlock()
-		return false
-	}
-	i := sort.SearchInts(s.set, elem)
-	res := i < len(s.set) && s.set[i] == elem
-	s.Unlock()
-	return res
-}
-
-// Remove removes an element from the list.
-// If the element is not found, it has no effect.
-func (s *OrderedIntSet) Remove(elem int) {
-	s.Lock()
-	if len(s.set) == 0 {
-		s.Unlock()
-		return
-	}
-	i := sort.SearchInts(s.set, elem)
-	if i < len(s.set) && s.set[i] == elem {
-		s.set = append(s.set[:i], s.set[i+1:]...)
-	}
-	s.Unlock()
-}
diff --git a/collections/orderedintset_test.go b/collections/orderedintset_test.go
deleted file mode 100644
index 0ac4ca5..0000000
--- a/collections/orderedintset_test.go
+++ /dev/null
@@ -1,71 +0,0 @@
-package collections
-
-import (
-	"math/rand"
-	"testing"
-)
-
-func BenchmarkPush(b *testing.B) {
-	var testSet []int
-	for i := 0; i < 1000; i++ {
-		testSet = append(testSet, rand.Int())
-	}
-	s := NewOrderedIntSet()
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		for _, elem := range testSet {
-			s.Push(elem)
-		}
-	}
-}
-
-func BenchmarkPop(b *testing.B) {
-	var testSet []int
-	for i := 0; i < 1000; i++ {
-		testSet = append(testSet, rand.Int())
-	}
-	s := NewOrderedIntSet()
-	for _, elem := range testSet {
-		s.Push(elem)
-	}
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		for j := 0; j < 1000; j++ {
-			s.Pop()
-		}
-	}
-}
-
-func BenchmarkExist(b *testing.B) {
-	var testSet []int
-	for i := 0; i < 1000; i++ {
-		testSet = append(testSet, rand.Intn(2000))
-	}
-	s := NewOrderedIntSet()
-	for _, elem := range testSet {
-		s.Push(elem)
-	}
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		for j := 0; j < 1000; j++ {
-			s.Exists(j)
-		}
-	}
-}
-
-func BenchmarkRemove(b *testing.B) {
-	var testSet []int
-	for i := 0; i < 1000; i++ {
-		testSet = append(testSet, rand.Intn(2000))
-	}
-	s := NewOrderedIntSet()
-	for _, elem := range testSet {
-		s.Push(elem)
-	}
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		for j := 0; j < 1000; j++ {
-			s.Remove(j)
-		}
-	}
-}