Revert of Add samples to Viewer.

samplecode/SampleAtlas.cpp

Index: samplecode/SampleAtlas.cpp
diff --git a/samplecode/SampleAtlas.cpp b/samplecode/SampleAtlas.cpp
index 3daf312f6a1a623d0a933e1e8087369ef3fe82d0..7cf1bb376193022114a31278bcbd8fd212ccfda5 100644
--- a/samplecode/SampleAtlas.cpp
+++ b/samplecode/SampleAtlas.cpp
@@ -232,11 +232,9 @@
 
     void onDrawContent(SkCanvas* canvas) override {
         canvas->drawDrawable(fDrawable);
-    }
-
-    bool onAnimate(const SkAnimTimer&) override {
-        return true;
-    }
+        this->inval(nullptr);
+    }
+
 #if 0
     // TODO: switch over to use this for our animation
     bool onAnimate(const SkAnimTimer& timer) override {