removed extra whitespace line

Author: ebogo1

Apps/Sandcastle/gallery/Imagery Layers Manipulation.html

@@ -158,7 +158,6 @@
           // These base layers aren't really special.  It's possible to have multiple of them
           // enabled at once, just like the other layers, but it doesn't make much sense because
           // all of these layers cover the entire globe and are opaque.
-
           addBaseLayerOption("Bing Maps Aerial", undefined); // the current base layer
           addBaseLayerOption(
             "Bing Maps Road",