Drop unneeded nullptr check from CreateNewBlock()

Author: Sjors

src/node/miner.cpp

@@ -113,10 +113,6 @@ std::unique_ptr<CBlockTemplate> BlockAssembler::CreateNewBlock(const CScript& sc
     resetBlock();
 
     pblocktemplate.reset(new CBlockTemplate());
-
-    if (!pblocktemplate.get()) {
-        return nullptr;
-    }
     CBlock* const pblock = &pblocktemplate->block; // pointer for convenience
 
     // Add dummy coinbase tx as first transaction