Remove obsolete Win32 AffinityBugWorkaround()

Reference miner exists for testnet-in-a-box type situations, and as a
reference.  We don't care enough about highly optimized internal
mining to keep workarounds like this.

src/main.cpp

@@ -3361,8 +3361,6 @@ void static BitcoinMiner(CWallet *pwallet)
 
     while (fGenerateBitcoins)
     {
-        if (AffinityBugWorkaround(ThreadBitcoinMiner))
-            return;
         if (fShutdown)
             return;
         while (vNodes.empty() || IsInitialBlockDownload())

src/util.h

@@ -706,26 +706,6 @@ inline void ExitThread(size_t nExitCode)
 
 
 
-inline bool AffinityBugWorkaround(void(*pfn)(void*))
-{
-#ifdef WIN32
-    // Sometimes after a few hours affinity gets stuck on one processor
-    DWORD_PTR dwProcessAffinityMask = -1;
-    DWORD_PTR dwSystemAffinityMask = -1;
-    GetProcessAffinityMask(GetCurrentProcess(), &dwProcessAffinityMask, &dwSystemAffinityMask);
-    DWORD dwPrev1 = SetThreadAffinityMask(GetCurrentThread(), dwProcessAffinityMask);
-    DWORD dwPrev2 = SetThreadAffinityMask(GetCurrentThread(), dwProcessAffinityMask);
-    if (dwPrev2 != dwProcessAffinityMask)
-    {
-        printf("AffinityBugWorkaround() : SetThreadAffinityMask=%d, ProcessAffinityMask=%d, restarting thread\n", dwPrev2, dwProcessAffinityMask);
-        if (!CreateThread(pfn, NULL))
-            printf("Error: CreateThread() failed\n");
-        return true;
-    }
-#endif
-    return false;
-}
-
 inline uint32_t ByteReverse(uint32_t value)
 {
     value = ((value & 0xFF00FF00) >> 8) | ((value & 0x00FF00FF) << 8);