Merge bitcoin/bitcoin#25966: test: Remove redundant test

fb1c6c1 test: Remove redundant test (yancy)

Pull request description:

  I can't think of any reason to keep this test case around labeled [fix me](https://github.com/bitcoin/bitcoin/blob/master/src/wallet/test/coinselector_tests.cpp#L242).  The test was originally added [here](bitcoin/bitcoin@4566ab7) however there was never an assertion about the coins that should be selected, only that a solution is found (which is a redundant solution to the test [above](https://github.com/bitcoin/bitcoin/blob/master/src/wallet/test/coinselector_tests.cpp#L222)).  The comment was later added here to [fix](bitcoin/bitcoin@3842732) it, however it's unclear what exactly it's testing.  A test was later added [here](https://github.com/bitcoin/bitcoin/blob/master/src/wallet/test/coinselector_tests.cpp#L366) where if the [long term fee](https://github.com/bitcoin/bitcoin/blob/master/src/wallet/test/coinselector_tests.cpp#L357) is less than the current [fee](https://github.com/bitcoin/bitcoin/blob/master/src/wallet/test/coinselector_tests.cpp#L356), then select fewer UTXOs, which may have been the original intent.

ACKs for top commit:
  S3RK:
    ACK fb1c6c1
  Zero-1729:
    Concept ACK fb1c6c1
  achow101:
    ACK fb1c6c1

Tree-SHA512: bce2cdae669c144ffaa130237a1643e3b6728e13d603cebf5d9493c4c7c68b3635868e4d93d210783c2ded2a871f185ca09a2053168c05b26a1e056ff6edf68f

Author: achow101

src/wallet/test/coinselector_tests.cpp

@@ -232,17 +232,6 @@ BOOST_AUTO_TEST_CASE(bnb_search_test)
     BOOST_CHECK_EQUAL(result5->GetSelectedValue(), 10 * CENT);
     expected_result.Clear();
 
-    // Negative effective value
-    // Select 10 Cent but have 1 Cent not be possible because too small
-    add_coin(5 * CENT, 5, expected_result);
-    add_coin(3 * CENT, 3, expected_result);
-    add_coin(2 * CENT, 2, expected_result);
-    const auto result6 = SelectCoinsBnB(GroupCoins(utxo_pool), 10 * CENT, 5000);
-    BOOST_CHECK(result6);
-    BOOST_CHECK_EQUAL(result6->GetSelectedValue(), 10 * CENT);
-    // FIXME: this test is redundant with the above, because 1 Cent is selected, not "too small"
-    // BOOST_CHECK(EquivalentResult(expected_result, *result));
-
     // Select 0.25 Cent, not possible
     BOOST_CHECK(!SelectCoinsBnB(GroupCoins(utxo_pool), 0.25 * CENT, 0.5 * CENT));
     expected_result.Clear();