Fix possible FragmentManager NPE in Dialer

Bug: 11595442
Change-Id: I7859f61bf8b5eb6b6e14d5f18cf689613124ce6c
diff --git a/src/com/android/dialer/DialtactsActivity.java b/src/com/android/dialer/DialtactsActivity.java
index 82d5c3f..faf63cd 100644
--- a/src/com/android/dialer/DialtactsActivity.java
+++ b/src/com/android/dialer/DialtactsActivity.java
@@ -852,7 +852,6 @@
         }
         // Go all the way back to the favorites fragment, regardless of how many times we
         // transitioned between search fragments
-        final BackStackEntry entry = getFragmentManager().getBackStackEntryAt(0);
         getFragmentManager().popBackStack(0, FragmentManager.POP_BACK_STACK_INCLUSIVE);
         setNotInSearchUi();
     }