Remove a module-lib API

Per b/150347230#comment18, remove the API since
RollbackManager will not be a module in S.

Bug: 150347230
Test: m
Change-Id: I1f356d0f5097da340986182314e47e3b6b6d9223

core/api/module-lib-current.txt

@@ -78,14 +78,6 @@ package android.content.pm {
 
 }
 
-package android.content.rollback {
-
-  public class RollbackManagerFrameworkInitializer {
-    method public static void initialize();
-  }
-
-}
-
 package android.hardware.usb {
 
   public class UsbManager {

core/java/android/content/rollback/RollbackManagerFrameworkInitializer.java

@@ -15,7 +15,6 @@
  */
 package android.content.rollback;
 
-import android.annotation.SystemApi;
 import android.app.SystemServiceRegistry;
 import android.content.Context;
 
@@ -24,7 +23,6 @@ import android.content.Context;
  *
  * @hide
  */
-@SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
 public class RollbackManagerFrameworkInitializer {
     private RollbackManagerFrameworkInitializer() {}