examples/deepzoom: stop setting OpenSeadragon minLevel

It appears that current OpenSeadragon uses a reasonable default.

Author: bgilbert

examples/deepzoom/templates/slide-fullpage.html

@@ -42,13 +42,6 @@
         zoomPerScroll: 2,
         timeout: 120000,
     });
-    viewer.addHandler("open", function() {
-        // To improve load times, ignore the lowest-resolution Deep Zoom
-        // levels.  This is a hack: we can't configure the minLevel via
-        // OpenSeadragon configuration options when the viewer is created
-        // from DZI XML.
-        viewer.source.minLevel = 8;
-    });
 
     var mpp = parseFloat("{{ slide_mpp }}");
     viewer.scalebar({

examples/deepzoom/templates/slide-multipane.html

@@ -128,13 +128,6 @@ <h1>Slide properties</h1>
         visibilityRatio: 1,
         zoomPerScroll: 2,
     });
-    viewer.addHandler("open", function() {
-        // To improve load times, ignore the lowest-resolution Deep Zoom
-        // levels.  This is a hack: we can't configure the minLevel via
-        // OpenSeadragon configuration options when the viewer is created
-        // from DZI XML.
-        viewer.source.minLevel = 8;
-    });
     viewer.scalebar({
         xOffset: 10,
         yOffset: 10,