Remove block file location upgrade code

An effort to reduce the size of AppInitMain().

The removed code upgrades the location of the block files when
upgrading to 0.8. 0.8 seems to be the oldest version still in use.

Author: Marko Bencun

src/init.cpp

@@ -1353,32 +1353,7 @@ bool AppInitMain(boost::thread_group& threadGroup, CScheduler& scheduler)
     fReindex = GetBoolArg("-reindex", false);
     bool fReindexChainState = GetBoolArg("-reindex-chainstate", false);
 
-    // Upgrading to 0.8; hard-link the old blknnnn.dat files into /blocks/
-    boost::filesystem::path blocksDir = GetDataDir() / "blocks";
-    if (!boost::filesystem::exists(blocksDir))
-    {
-        boost::filesystem::create_directories(blocksDir);
-        bool linked = false;
-        for (unsigned int i = 1; i < 10000; i++) {
-            boost::filesystem::path source = GetDataDir() / strprintf("blk%04u.dat", i);
-            if (!boost::filesystem::exists(source)) break;
-            boost::filesystem::path dest = blocksDir / strprintf("blk%05u.dat", i-1);
-            try {
-                boost::filesystem::create_hard_link(source, dest);
-                LogPrintf("Hardlinked %s -> %s\n", source.string(), dest.string());
-                linked = true;
-            } catch (const boost::filesystem::filesystem_error& e) {
-                // Note: hardlink creation failing is not a disaster, it just means
-                // blocks will get re-downloaded from peers.
-                LogPrintf("Error hardlinking blk%04u.dat: %s\n", i, e.what());
-                break;
-            }
-        }
-        if (linked)
-        {
-            fReindex = true;
-        }
-    }
+    boost::filesystem::create_directories(GetDataDir() / "blocks");
 
     // cache size calculations
     int64_t nTotalCache = (GetArg("-dbcache", nDefaultDbCache) << 20);