Remove unused CDataStream methods

src/streams.h

@@ -264,19 +264,6 @@ public:
         nVersion = nVersionIn;
     }
 
-    CDataStream& operator+=(const CDataStream& b)
-    {
-        vch.insert(vch.end(), b.begin(), b.end());
-        return *this;
-    }
-
-    friend CDataStream operator+(const CDataStream& a, const CDataStream& b)
-    {
-        CDataStream ret = a;
-        ret += b;
-        return (ret);
-    }
-
     std::string str() const
     {
         return (std::string(begin(), end()));
@@ -462,11 +449,6 @@ public:
         return (*this);
     }
 
-    void GetAndClear(CSerializeData &d) {
-        d.insert(d.end(), begin(), end());
-        clear();
-    }
-
     /**
      * XOR the contents of this stream with a certain key.
      *

src/test/serialize_tests.cpp

@@ -342,11 +342,6 @@ BOOST_AUTO_TEST_CASE(insert_delete)
     BOOST_CHECK_EQUAL(ss[1], 1);
     BOOST_CHECK_EQUAL(ss[2], 2);
     BOOST_CHECK_EQUAL(ss[3], (char)0xff);
-
-    // Make sure GetAndClear does the right thing:
-    CSerializeData d;
-    ss.GetAndClear(d);
-    BOOST_CHECK_EQUAL(ss.size(), 0U);
 }
 
 BOOST_AUTO_TEST_CASE(class_methods)