diff --git a/src/main/java/com/github/prominence/openweathermap/api/constants/System.java b/src/main/java/com/github/prominence/openweathermap/api/constants/System.java
deleted file mode 100644
index d429c29..0000000
--- a/src/main/java/com/github/prominence/openweathermap/api/constants/System.java
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- * Copyright (c) 2018 Alexey Zinchenko
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-package com.github.prominence.openweathermap.api.constants;
-
-public final class System {
-
-    private System() {}
-
-    public static final String OPEN_WEATHER_API_VERSION = "2.5";
-    public static final String OPEN_WEATHER_API_URL = "http://api.openweathermap.org/data/" + OPEN_WEATHER_API_VERSION + "/";
-}