Clean up code.

app/Repositories/UserGroups/Bill/BillRepository.php

@@ -157,7 +157,7 @@ class BillRepository implements BillRepositoryInterface
                 $currencyId                        = $bill->transaction_currency_id;
                 $average                           = bcdiv(bcadd($bill->amount_max, $bill->amount_min), '2');
                 $nativeAverage                     = $converter->convert($currency, $default, $start, $average);
-                $return[$currencyId] ??= [
+                $return[$currencyId]               ??= [
                     'currency_id'             => (string)$currency->id,
                     'currency_name'           => $currency->name,
                     'currency_symbol'         => $currency->symbol,

app/Repositories/UserGroups/Bill/BillRepositoryInterface.php

@@ -35,13 +35,6 @@ use Illuminate\Support\Collection;
  */
 interface BillRepositoryInterface
 {
-    /**
-     * @param User $user
-     *
-     * @return void
-     */
-    public function setUser(User $user): void;
-
     /**
      * TODO duplicate of other repos
      * Add correct order to bills.
@@ -84,6 +77,13 @@ interface BillRepositoryInterface
      */
     public function nextDateMatch(Bill $bill, Carbon $date): Carbon;
 
+    /**
+     * @param User $user
+     *
+     * @return void
+     */
+    public function setUser(User $user): void;
+
     /**
      * Collect multi-currency of sum of bills already paid.
      *