sweep: remove deprecated rand.Seed

sweep/sweeper.go

@@ -3,7 +3,6 @@ package sweep
 import (
 	"errors"
 	"fmt"
-	"math/rand"
 	"sync"
 	"sync/atomic"
 	"time"
@@ -1571,8 +1570,3 @@ func (s *UtxoSweeper) sweepPendingInputs(inputs pendingInputs) {
 		}
 	}
 }
-
-// init initializes the random generator for random input rescheduling.
-func init() {
-	rand.Seed(time.Now().Unix())
-}