Remove dead code.

app/Helpers/Collection/BalanceLine.php

@@ -40,10 +40,6 @@ class BalanceLine
      *
      */
     public const ROLE_TAGROLE = 2;
-    /**
-     *
-     */
-    public const ROLE_DIFFROLE = 3;
 
     /** @var Collection */
     protected $balanceEntries;
@@ -167,9 +163,6 @@ class BalanceLine
         if (self::ROLE_TAGROLE === $this->getRole()) {
             return (string)trans('firefly.coveredWithTags');
         }
-        if (self::ROLE_DIFFROLE === $this->getRole()) {
-            return (string)trans('firefly.leftUnbalanced');
-        }
 
         return '';
     }

app/Helpers/Report/PopupReport.php

@@ -36,33 +36,6 @@ use Illuminate\Support\Collection;
  */
 class PopupReport implements PopupReportInterface
 {
-    /**
-     * @param $account
-     * @param $attributes
-     *
-     * @return Collection
-     */
-    public function balanceDifference($account, $attributes): Collection
-    {
-        // row that displays difference
-        /** @var JournalCollectorInterface $collector */
-        $collector = app(JournalCollectorInterface::class);
-        $collector
-            ->setAccounts(new Collection([$account]))
-            ->setTypes([TransactionType::WITHDRAWAL])
-            ->setRange($attributes['startDate'], $attributes['endDate'])
-            ->withoutBudget();
-        $journals = $collector->getJournals();
-
-        return $journals->filter(
-            function (Transaction $transaction) {
-                $tags = $transaction->transactionJournal->tags()->where('tagMode', 'balancingAct')->count();
-
-                return 0 === $tags;
-            }
-        );
-    }
-
     /**
      * @param Budget  $budget
      * @param Account $account

app/Helpers/Report/PopupReportInterface.php

@@ -32,14 +32,6 @@ use Illuminate\Support\Collection;
  */
 interface PopupReportInterface
 {
-    /**
-     * @param $account
-     * @param $attributes
-     *
-     * @return Collection
-     */
-    public function balanceDifference($account, $attributes): Collection;
-
     /**
      * @param Budget  $budget
      * @param Account $account