Clean up examples directory

sky/examples/scrolling/scrolling.sky

Index: sky/examples/scrolling/scrolling.sky
diff --git a/sky/examples/example-scrollable/example-scrollable.sky b/sky/examples/scrolling/scrolling.sky
similarity index 82%
rename from sky/examples/example-scrollable/example-scrollable.sky
rename to sky/examples/scrolling/scrolling.sky
index c6f27b88215d22c704bdaf282aca5306fa92a9d1..4220b02592ec7092bd4c94a9e8edccae4eef8d4e 100644
--- a/sky/examples/example-scrollable/example-scrollable.sky
+++ b/sky/examples/scrolling/scrolling.sky
@@ -7,7 +7,7 @@
 <import src="/sky/framework/sky-scrollable.sky" />
 <import src="../data/cities.sky" as="cities" />
 
-<sky-element name="example-scrollable">
+<sky-element>
 <template>
   <style>
   sky-scrollable {
@@ -21,8 +21,8 @@
 <script>
 import "dart:sky";
 
-@Tagname('example-scrollable')
-class ExampleScrollable extends SkyElement {
+@Tagname('scrolling')
+class Scrolling extends SkyElement {
   void shadowRootReady() {
     Element parent = shadowRoot.querySelector('sky-scrollable');
     for (Map city in cities.kData.getRange(0, 300)) {
@@ -33,6 +33,6 @@ class ExampleScrollable extends SkyElement {
   }
 }
 
-_init(script) => register(script, ExampleScrollable);
+_init(script) => register(script, Scrolling);
 </script>
 </sky-element>