Remove dead code.

app/Helpers/Fiscal/FiscalHelperInterface.php

@@ -0,0 +1,51 @@
+<?php
+/**
+ * FiscalHelperInterface.php
+ * Copyright (c) 2017 thegrumpydictator@gmail.com
+ *
+ * This file is part of Firefly III.
+ *
+ * Firefly III is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Firefly III is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Firefly III. If not, see <http://www.gnu.org/licenses/>.
+ */
+declare(strict_types=1);
+
+namespace FireflyIII\Helpers;
+
+use Carbon\Carbon;
+
+/**
+ * Interface FiscalHelperInterface.
+ */
+interface FiscalHelperInterface
+{
+    /**
+     * This method produces a clone of the Carbon date object passed, checks preferences
+     * and calculates the last day of the fiscal year.
+     *
+     * @param Carbon $date
+     *
+     * @return Carbon date object
+     */
+    public function endOfFiscalYear(Carbon $date): Carbon;
+
+    /**
+     * This method produces a clone of the Carbon date object passed, checks preferences
+     * and calculates the first day of the fiscal year.
+     *
+     * @param Carbon $date
+     *
+     * @return Carbon date object
+     */
+    public function startOfFiscalYear(Carbon $date): Carbon;
+}