Remove references to static class.

app/Support/Amount.php

@@ -126,22 +126,15 @@ class Amount
 
     /**
      * @param User $user
-     * @deprecated use getDefaultCurrencyByUserGroup instead.
+     *
      * @return TransactionCurrency
+     * @deprecated use getDefaultCurrencyByUserGroup instead.
      */
     public function getDefaultCurrencyByUser(User $user): TransactionCurrency
     {
         return $this->getDefaultCurrencyByUserGroup($user->userGroup);
     }
 
-    /**
-     * @return TransactionCurrency
-     */
-    public function getSystemCurrency(): TransactionCurrency
-    {
-        return TransactionCurrency::where('code', 'EUR')->first();
-    }
-
     /**
      * @param User $user
      *
@@ -165,6 +158,14 @@ class Amount
         return $default;
     }
 
+    /**
+     * @return TransactionCurrency
+     */
+    public function getSystemCurrency(): TransactionCurrency
+    {
+        return TransactionCurrency::where('code', 'EUR')->first();
+    }
+
     /**
      * This method returns the correct format rules required by accounting.js,
      * the library used to format amounts in charts.