remove repetitive words

Signed-off-by: cuinix <915115094@qq.com>

lnwallet/chainfee/rates.go

@@ -13,7 +13,7 @@ const (
 	FeePerKwFloor SatPerKWeight = 253
 
 	// AbsoluteFeePerKwFloor is the lowest fee rate in sat/kw of a
-	// transaction that we should ever _create_. This is the the equivalent
+	// transaction that we should ever _create_. This is the equivalent
 	// of 1 sat/byte in sat/kw.
 	AbsoluteFeePerKwFloor SatPerKWeight = 250
 )

lnwallet/chanfunding/coin_select.go

@@ -307,7 +307,7 @@ func CoinSelectSubtractFees(feeRate chainfee.SatPerKWeight, amt,
 	outputAmt := totalSat - requiredFeeNoChange
 	changeAmt := btcutil.Amount(0)
 
-	// If the the output is too small after subtracting the fee, the coin
+	// If the output is too small after subtracting the fee, the coin
 	// selection cannot be performed with an amount this small.
 	if outputAmt < dustLimit {
 		return nil, 0, 0, fmt.Errorf("output amount(%v) after "+