Revert 190531 "Get OAuth2TokenService working on Android."

trunk/src/sync/android/java/src/org/chromium/sync/signin/AccountManagerHelper.java

Index: trunk/src/sync/android/java/src/org/chromium/sync/signin/AccountManagerHelper.java
===================================================================
--- trunk/src/sync/android/java/src/org/chromium/sync/signin/AccountManagerHelper.java	(revision 190557)
+++ trunk/src/sync/android/java/src/org/chromium/sync/signin/AccountManagerHelper.java	(working copy)
@@ -306,11 +306,4 @@
         getAuthTokenAsynchronously(
             null, account, authTokenType, callback, numTries, errorEncountered, null);
     }
-
-    /**
-     * Removes an auth token from the AccountManager's cache.
-     */
-    public void invalidateAuthToken(String accountType, String authToken) {
-        mAccountManager.invalidateAuthToken(accountType, authToken);
-    }
 }