SampleApp: remove SkWindow::onPDFSaved, it does not work

platform_tools/android/apps/visualbench/src/main/jni/SkOSWindow_AndroidNative.cpp

Index: platform_tools/android/apps/visualbench/src/main/jni/SkOSWindow_AndroidNative.cpp
diff --git a/platform_tools/android/apps/visualbench/src/main/jni/SkOSWindow_AndroidNative.cpp b/platform_tools/android/apps/visualbench/src/main/jni/SkOSWindow_AndroidNative.cpp
index df1ca96374a19f933ce7cea18b299bf87ceea2a7..76ace6df4661fbed7ac8620fd1f9f6f0404251e3 100644
--- a/platform_tools/android/apps/visualbench/src/main/jni/SkOSWindow_AndroidNative.cpp
+++ b/platform_tools/android/apps/visualbench/src/main/jni/SkOSWindow_AndroidNative.cpp
@@ -188,9 +188,6 @@ void SkOSWindow::onSetTitle(const char title[]) {
 void SkOSWindow::onHandleInval(const SkIRect& rect) {
 }
 
-void SkOSWindow::onPDFSaved(const char title[], const char desc[], const char path[]) {
-}
-
 ///////////////////////////////////////////
 /////////////// SkEvent impl //////////////
 ///////////////////////////////////////////