Various code cleanup.

app/Console/Commands/Correction/ConvertsDatesToUTC.php

@@ -92,7 +92,6 @@ class ConvertsDatesToUTC extends Command
         $this->friendlyInfo(sprintf('Converting field "%s" of model "%s" to UTC.', $field, $shortModel));
         $items->each(
             function ($item) use ($field, $timezoneField): void {
-                /** @var Carbon $date */
                 $date                   = Carbon::parse($item->{$field}, $item->{$timezoneField}); // @phpstan-ignore-line
                 $date->setTimezone('UTC');
                 $item->{$field}         = $date->format('Y-m-d H:i:s'); // @phpstan-ignore-line