enc-backup: didn't like the check mark icon after all

Graphics/get-material-icons.sh

@@ -48,7 +48,6 @@ python copy OpenKeychain social black share 24
 python copy OpenKeychain content black content_copy 24
 python copy OpenKeychain communication black chat 24
 python copy OpenKeychain navigation black more_vert 24
-python copy OpenKeychain navigation black check 24
 
 # navigation drawer sections
 python copy OpenKeychain communication black vpn_key 24

OpenKeychain/src/main/res/layout/backup_code_entry_fragment.xml

@@ -268,8 +268,6 @@
             android:layout_gravity="center_horizontal"
             android:layout_margin="10dp"
             android:text="Ok, I wrote it down!"
-            android:drawableLeft="@drawable/ic_check_black_24dp"
-            android:drawablePadding="8dp"
             android:padding="12dp"
             android:id="@+id/button_backup_input"
             style="?android:buttonBarButtonStyle"