remove moveHead

src/common.cc

@@ -58,10 +58,6 @@ template<class T> CirBuffer<T>::CirBuffer(int size) :
   assert(size > 0);
 }
 
-template<class T> void CirBuffer<T>::moveHead(int n) {
-  m_head = (m_head + n) % m_len;
-}
-
 template<class T> void CirBuffer<T>::forward(int n) {
   m_tail = (m_tail + n) % m_len;
   m_fill_count -= n;

src/common.h

@@ -30,7 +30,6 @@ using Melody = std::vector<Tone>;
 template<class T> class CirBuffer {
   public:
     CirBuffer(int len);
-    void moveHead(int n);
     int size() const;
     void append(const std::vector<T>& input_data, int n);
     void appendOverlapFiltered(T input_element, const Wave& filter);