Remove unused and duplicate strings

Change-Id: I7e1a3120e66ca8bc3adab65499663fecb5b041a3
diff --git a/res/layout/browser_add_bookmark_content.xml b/res/layout/browser_add_bookmark_content.xml
index 186bbc0..8c5191f 100644
--- a/res/layout/browser_add_bookmark_content.xml
+++ b/res/layout/browser_add_bookmark_content.xml
@@ -213,12 +213,12 @@
             android:layout_height="wrap_content"
             style="?android:attr/buttonBarButtonStyle" />
         <Button android:id="@+id/cancel"
-            android:text="@string/do_not_save"
+            android:text="@string/cancel"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             style="?android:attr/buttonBarButtonStyle" />
         <Button android:id="@+id/OK"
-            android:text="@string/save"
+            android:text="@string/ok"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             style="?android:attr/buttonBarButtonStyle" />
diff --git a/res/layout/download_settings.xml b/res/layout/download_settings.xml
index 2797239..d678713 100644
--- a/res/layout/download_settings.xml
+++ b/res/layout/download_settings.xml
@@ -186,7 +186,7 @@
             android:layout_gravity="end"
             android:layout_weight="1"
             android:maxLines="1"
-            android:text="@string/download_cancel" />
+            android:text="@string/cancel" />
 
         <Button
             android:id="@+id/download_start"
@@ -196,7 +196,7 @@
             android:layout_gravity="start"
             android:layout_weight="1"
             android:maxLines="1"
-            android:text="@string/download_start" />
+            android:text="@string/ok" />
     </LinearLayout>
 
 </LinearLayout>
diff --git a/res/layout/my_navigation_add_page.xml b/res/layout/my_navigation_add_page.xml
index 43d3e5f..46943c6 100755
--- a/res/layout/my_navigation_add_page.xml
+++ b/res/layout/my_navigation_add_page.xml
@@ -138,7 +138,7 @@
                 android:layout_gravity="end"
                 android:layout_weight="1"
                 android:maxLines="2"
-                android:text="@string/do_not_save" />
+                android:text="@string/cancel" />
 
             <Button
                 android:id="@+id/OK"
@@ -148,7 +148,7 @@
                 android:layout_gravity="start"
                 android:layout_weight="1"
                 android:maxLines="2"
-                android:text="@string/save" />
+                android:text="@string/ok" />
         </LinearLayout>
     </LinearLayout>