itest: require no error when tearing down miners

lntest/itest/lnd_test.go

@@ -2477,7 +2477,12 @@ func testOpenChannelAfterReorg(net *lntest.NetworkHarness, t *harnessTest) {
 	if err := tempMiner.SetUp(false, 0); err != nil {
 		t.Fatalf("unable to set up mining node: %v", err)
 	}
-	defer tempMiner.TearDown()
+	defer func() {
+		require.NoError(
+			t.t, tempMiner.TearDown(),
+			"failed to tear down temp miner",
+		)
+	}()
 
 	// We start by connecting the new miner to our original miner,
 	// such that it will sync to our original chain.
@@ -14414,7 +14419,9 @@ func TestLightningNetworkDaemon(t *testing.T) {
 		ht.Fatalf("unable to create mining node: %v", err)
 	}
 	defer func() {
-		miner.TearDown()
+		require.NoError(
+			t, miner.TearDown(), "failed to tear down miner",
+		)
 
 		// After shutting down the miner, we'll make a copy of the log
 		// file before deleting the temporary log dir.