Fix Wdeprecated-copy warning in primitives block

src/primitives/block.h

@@ -38,7 +38,6 @@ class CBlockHeader
     {
         SetNull();
     }
-    virtual ~CBlockHeader(){};
 
     SERIALIZE_METHODS(CBlockHeader, obj) { READWRITE(obj.nVersion, obj.hashPrevBlock, obj.hashMerkleRoot, obj.nTime, obj.nBits, obj.nNonce, obj.hashStateRoot, obj.hashUTXORoot, obj.prevoutStake, obj.vchBlockSigDlgt); }
 
@@ -78,17 +77,17 @@ class CBlockHeader
     }
 
     // ppcoin: two types of block: proof-of-work or proof-of-stake
-    virtual bool IsProofOfStake() const //qtum
+    bool IsProofOfStake() const //qtum
     {
         return !prevoutStake.IsNull();
     }
 
-    virtual bool IsProofOfWork() const
+    bool IsProofOfWork() const
     {
         return !IsProofOfStake();
     }
 
-    virtual uint32_t StakeTime() const
+    uint32_t StakeTime() const
     {
         uint32_t ret = 0;
         if(IsProofOfStake())
@@ -105,24 +104,6 @@ class CBlockHeader
     std::vector<unsigned char> GetProofOfDelegation() const;
 
     bool HasProofOfDelegation() const;
-
-    CBlockHeader& operator=(const CBlockHeader& other) //qtum
-    {
-        if (this != &other)
-        {
-            this->nVersion       = other.nVersion;
-            this->hashPrevBlock  = other.hashPrevBlock;
-            this->hashMerkleRoot = other.hashMerkleRoot;
-            this->nTime          = other.nTime;
-            this->nBits          = other.nBits;
-            this->nNonce         = other.nNonce;
-            this->hashStateRoot  = other.hashStateRoot;
-            this->hashUTXORoot   = other.hashUTXORoot;
-            this->vchBlockSigDlgt    = other.vchBlockSigDlgt;
-            this->prevoutStake   = other.prevoutStake;
-        }
-        return *this;
-    }
 };