message: Remove dead code for walletFile check
  SplitWalletPath() garanties the walletFile is a plain filename without a
  directory.
diff: @@ -407,13 +407,6 @@ bool BerkeleyBatch::VerifyEnvironment(const fs::path& file_path, std::string& er
  LogPrintf("Using BerkeleyDB version %s\n", DbEnv::version(nullptr, nullptr, nullptr));
  LogPrintf("Using wallet %s\n", file_path.string());
  - // Wallet file must be a plain filename without a directory
  - if (walletFile != fs::basename(walletFile) + fs::extension(walletFile))
  - {
  - errorStr = strprintf(_("Wallet %s resides outside wallet directory %s"), walletFile, walletDir.string());
  - return false;
  - }
  -
  if (!env->Open(true /* retry */)) {
  errorStr = strprintf(_("Error initializing wallet database environment %s!"), walletDir);
  return false;
  