diff --git a/src/graph.h b/src/graph.h
index 965e0747..80a18a9c 100644
--- a/src/graph.h
+++ b/src/graph.h
@@ -10,53 +10,6 @@
 
 class Graph {
     public:
-    // constructors
-    // default constructor
-    Graph()
-    {
-        cout << "Graph default constructor" << endl;
-    };
-
-    // copy
-    Graph(const Graph & rhs)
-    {
-          std::cout << "Graph copy constructor" << std::endl;
-          _GraphVector = rhs._GraphVector;
-    };
-    // copy operator
-    Graph & operator = (const Graph & rhs)
-    {
-          std::cout << "Graph copy operator" << std::endl;
-          if(this != &rhs)
-          {
-            _GraphVector = rhs._GraphVector;
-          }
-          return *this;
-    };
-
-    // move
-    Graph(const Graph && rhs) noexcept
-    {
-          std::cout << "Graph move constructor" << std::endl;
-          _GraphVector = std::move(rhs._GraphVector);
-    };
-    // move operator
-    Graph & operator = (const Graph && rhs) noexcept
-    {
-          std::cout << "Graph move operator" << std::endl;
-          if(this != &rhs)
-          {
-            _GraphVector = std::move(rhs._GraphVector);
-          }
-          return *this;
-    };
-
-    // destructor
-    ~Graph()
-    {
-        std::cout << "Graph destructor" << std::endl;
-    };
-
     // build new bifrost graph and index
     GraphTuple build (const std::string& infile1,
                     const int kmer,