test: refresh route hint preservation comments

lndclient now forwards route hints through AddInvoice. These tests
assert that Loop preserves explicit hints on generated loop-in invoices.
Remove stale comments that described the old wrapper behavior as
dropping hints.

Author: starius

loopin_test.go

@@ -127,9 +127,8 @@ func TestLoopInSuccess(t *testing.T) {
 }
 
 // TestLoopInSwapInvoiceRouteHintsMatchProbe asserts that explicit route hints
-// are preserved on both loop-in invoices. The probe invoice already keeps the
-// requested hints, while the swap invoice currently loses them via the
-// lndclient AddInvoice wrapper.
+// are preserved on both loop-in invoices so the swap invoice matches the probe
+// invoice.
 func TestLoopInSwapInvoiceRouteHintsMatchProbe(t *testing.T) {
 	t.Parallel()
 

staticaddr/loopin/actions_test.go

@@ -130,7 +130,7 @@ func TestMonitorInvoiceAndHtlcTxReRegistersOnConfErr(t *testing.T) {
 
 // TestInitHtlcActionPreservesRouteHints asserts that static-address loop-in
 // propagates explicit route hints into the encoded swap invoice sent to the
-// server. This currently fails because lndclient.AddInvoice drops route hints.
+// server.
 func TestInitHtlcActionPreservesRouteHints(t *testing.T) {
 	t.Parallel()