Merge bitcoin/bitcoin#29822: test: remove immediate tx relay workaround in wallet_groups.py

93fae5a test: remove immediate tx relay workaround in wallet_groups.py (Sebastian Falbesoner)

Pull request description:

  Reverts commit ab4efad (PR #26970). This workaround is not needed anymore, as since #27114 the test sets the noban permission for both in- and outbound connections via the `noban_tx_relay` setting, and we don't have to rely on this topology hack anymore. See commit c985eb8 (kudos to brunoerg!).

  Can be tested by executing `$ time ./test/functional/wallet_groups.py` both on master and PR and verifying that the execution time is roughly equal.

ACKs for top commit:
  maflcko:
    lgtm ACK 93fae5a
  brunoerg:
    utACK 93fae5a

Tree-SHA512: b949fd05b4308815ba02d0ee4d1318f642b930288dd03223f46db7db745177af1c070bc7058743ac27963c5ad90564089867cc12f31fee94812a16919c353bab

Author: fanquake

test/functional/wallet_groups.py

@@ -42,11 +42,6 @@ def skip_test_if_missing_module(self):
 
     def run_test(self):
         self.log.info("Setting up")
-        # To take full use of immediate tx relay, all nodes need to be reachable
-        # via inbound peers, i.e. connect first to last to close the circle
-        # (the default test network topology looks like this:
-        #  node0 <-- node1 <-- node2 <-- node3 <-- node4 <-- node5)
-        self.connect_nodes(0, self.num_nodes - 1)
         # Mine some coins
         self.generate(self.nodes[0], COINBASE_MATURITY + 1)