Remove unused and duplicate strings

Change-Id: I7e1a3120e66ca8bc3adab65499663fecb5b041a3
diff --git a/src/com/android/browser/ComboViewActivity.java b/src/com/android/browser/ComboViewActivity.java
index 4e672ca..4731451 100644
--- a/src/com/android/browser/ComboViewActivity.java
+++ b/src/com/android/browser/ComboViewActivity.java
@@ -63,9 +63,9 @@
         }
 
         mTabsAdapter = new ComboTabsAdapter(this, mViewPager);
-        mTabsAdapter.addTab(bar.newTab().setText(R.string.tab_bookmarks),
+        mTabsAdapter.addTab(bar.newTab().setText(R.string.bookmarks),
                 BrowserBookmarksPage.class, args);
-        mTabsAdapter.addTab(bar.newTab().setText(R.string.tab_history),
+        mTabsAdapter.addTab(bar.newTab().setText(R.string.history),
                 BrowserHistoryPage.class, args);
         mTabsAdapter.addTab(bar.newTab().setText(R.string.tab_snapshots),
                 BrowserSnapshotPage.class, args);