message: Remove a useless assert() from getblockchainfo()
  spottee by
diff: @@ -1209,7 +1209,6 @@ UniValue getblockchaininfo(const UniValue &params, bool fHelp)
  assert(block);
  {
  READLOCK(cs_mapBlockIndex);
  - assert(block);
  while (block && block->pprev && (block->pprev->nStatus & BLOCK_HAVE_DATA))
  {
  block = block->pprev;
  