Various code cleanup.

app/Console/Commands/Correction/CorrectOpeningBalanceCurrencies.php

@@ -57,6 +57,7 @@ class CorrectOpeningBalanceCurrencies extends Command
      * Execute the console command.
      *
      * @return int
+     * @throws JsonException
      */
     public function handle(): int
     {
@@ -96,7 +97,6 @@ class CorrectOpeningBalanceCurrencies extends Command
      * @param TransactionJournal $journal
      *
      * @return int
-     * @throws JsonException
      */
     private function correctJournal(TransactionJournal $journal): int
     {

app/Console/Commands/Correction/DeleteZeroAmount.php

@@ -27,7 +27,6 @@ use Exception;
 use FireflyIII\Models\Transaction;
 use FireflyIII\Models\TransactionJournal;
 use Illuminate\Console\Command;
-use Illuminate\Support\Collection;
 
 /**
  * Class DeleteZeroAmount