message: test: remove BasicTestingSetup from base64 unit tests
diff: // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  -#include <test/util/setup_common.h>
  #include <util/strencodings.h>
  #include <boost/test/unit_test.hpp>
  using namespace std::literals;
  -BOOST_FIXTURE_TEST_SUITE(base64_tests, BasicTestingSetup)
  +BOOST_AUTO_TEST_SUITE(base64_tests)
  BOOST_AUTO_TEST_CASE(base64_testvectors)
  {
  