Revert of Add a PhysicalWebEnvironment class

chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PhysicalWebEnvironment.java

Index: chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PhysicalWebEnvironment.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PhysicalWebEnvironment.java b/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PhysicalWebEnvironment.java
deleted file mode 100644
index 26655d3e0a1233d0bea741edd50e8f661e668c2d..0000000000000000000000000000000000000000
--- a/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PhysicalWebEnvironment.java
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package org.chromium.chrome.browser.physicalweb;
-
-import org.chromium.base.ThreadUtils;
-import org.chromium.chrome.browser.ChromeApplication;
-
-/**
- * Tool that reports information about conflicting clients.
- */
-public class PhysicalWebEnvironment {
-    private static PhysicalWebEnvironment sInstance = null;
-
-    /**
-     * Get a singleton instance of this class.
-     * @param chromeApplication An instance of {@link ChromeApplication}, used to get the
-     * appropriate PhysicalWebEnvironment implementation.
-     * @return an instance of this class (or subclass) as decided by the application parameter
-     */
-    public static PhysicalWebEnvironment getInstance(ChromeApplication chromeApplication) {
-        ThreadUtils.assertOnUiThread();
-        if (sInstance == null) {
-            sInstance = chromeApplication.createPhysicalWebEnvironment();
-        }
-        return sInstance;
-    }
-
-    /**
-     * Reports whether the environment has another notification-based Physical Web client enabled.
-     * @return true if there is another notification-based Physical Web client enabled.
-     */
-    public boolean hasNotificationBasedClient() {
-        return false;
-    }
-}