Fix linter error

- remove nextPotentialRun.Add that had no effect

internal/jobs/remindvoters.go

@@ -1,5 +1,5 @@
 /*
-Copyright 2017-2022 CAcert Inc.
+Copyright 2017-2023 CAcert Inc.
 SPDX-License-Identifier: Apache-2.0
 
 Licensed under the Apache License, Version 2.0 (the "License");
@@ -47,7 +47,6 @@ func (r *RemindVotersJob) Schedule() {
 	year, month, day := now.Date()
 
 	nextPotentialRun := time.Date(year, month, day+1, 0, 0, 0, 0, time.UTC)
-	nextPotentialRun.Add(hoursInDay * time.Hour)
 
 	relevantDue := nextPotentialRun.Add(reminderDays * hoursInDay * time.Hour)