tests: Reduce noise level in test_bitcoin output

src/wallet/test/coinselector_tests.cpp

@@ -135,7 +135,6 @@ BOOST_AUTO_TEST_CASE(bnb_search_test)
     /////////////////////////
     // Known Outcome tests //
     /////////////////////////
-    BOOST_TEST_MESSAGE("Testing known outcomes");
 
     // Empty utxo pool
     BOOST_CHECK(!SelectCoinsBnB(GroupCoins(utxo_pool), 1 * CENT, 0.5 * CENT, selection, value_ret, not_input_fees));