Remove the unsed code for showing Toast after shortcut added by O API.

chrome/android/java/src/org/chromium/chrome/browser/ShortcutHelper.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ShortcutHelper.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ShortcutHelper.java b/chrome/android/java/src/org/chromium/chrome/browser/ShortcutHelper.java
index 0297393ce330fa33f80396d76005df0cf80330b9..6fcc9e915329bc248f897e33a9be34adb53a0853 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ShortcutHelper.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ShortcutHelper.java
@@ -33,7 +33,6 @@ import org.chromium.base.VisibleForTesting;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.blink_public.platform.WebDisplayMode;
 import org.chromium.chrome.R;
-import org.chromium.chrome.browser.util.IntentUtils;
 import org.chromium.chrome.browser.webapps.ChromeShortcutManager;
 import org.chromium.chrome.browser.webapps.ChromeWebApkHost;
 import org.chromium.chrome.browser.webapps.WebApkInfo;
@@ -80,10 +79,6 @@ public class ShortcutHelper {
     public static final String REUSE_URL_MATCHING_TAB_ELSE_NEW_TAB =
             "REUSE_URL_MATCHING_TAB_ELSE_NEW_TAB";
 
-    /** Used for the callback intent when using the new shortcut API. */
-    public static final String SHORTCUT_TOAST_CATEGORY =
-            "com.google.intent.category.SHORTCUT_TOAST";
-
     // When a new field is added to the intent, this version should be incremented so that it will
     // be correctly populated into the WebappRegistry/WebappDataStorage.
     public static final int WEBAPP_SHORTCUT_VERSION = 2;
@@ -232,24 +227,6 @@ public class ShortcutHelper {
     }
 
     /**
-     * Show toast when getting the callback intent by the launcher after adding shortcut by using
-     * the new shortcut API.
-     */
-    public static void showAddedToHomescreenToastFromIntent(Intent intent) {
-        String title = IntentUtils.safeGetStringExtra(intent, Intent.EXTRA_SHORTCUT_NAME);
-        showAddedToHomescreenToast(title);
-    }
-
-    /**
-     * Determine if it is a callback intent (which requests for a show-toast), used in the new
-     * shortcut API.
-     */
-    public static boolean isShowToastIntent(Intent intent) {
-        if (intent == null || intent.getCategories() == null) return false;
-        return intent.getCategories().contains(SHORTCUT_TOAST_CATEGORY);
-    }
-
-    /**
      * Shows toast notifying user that a WebAPK install is already in progress when user tries to
      * queue a new install for the same WebAPK.
      */