Simplify by using MovingMedianStack to implement MovingMedian

src/common/SampleFilter.h

@@ -33,24 +33,10 @@ template <typename T>
 class SampleFilter
 {
 public:
-    SampleFilter(int size) : m_size(size) {
-	assert(m_size > 0);
-    }
-
-    virtual ~SampleFilter() { }
-
-    int getSize() const { return m_size; }
-
+    virtual int getSize() const = 0;
     virtual void push(T) = 0;
     virtual T get() const = 0;
     virtual void reset() = 0;
-
-protected:
-    const int m_size;
-
-private:
-    SampleFilter(const SampleFilter &);
-    SampleFilter &operator=(const SampleFilter &);
 };
 
 }