Delete a bunch of NPAPI layout tests.

LayoutTests/plugins/destroy-on-setwindow.html

Index: LayoutTests/plugins/destroy-on-setwindow.html
diff --git a/LayoutTests/plugins/destroy-on-setwindow.html b/LayoutTests/plugins/destroy-on-setwindow.html
deleted file mode 100644
index c8d1efc0b62e2f808ef568e2295b637c08b161f0..0000000000000000000000000000000000000000
--- a/LayoutTests/plugins/destroy-on-setwindow.html
+++ /dev/null
@@ -1,23 +0,0 @@
-<p>
-    Test that a plugin that causes its Widget to be destroyed during setWindow does not cause a crash.
-</p>
-<embed id="plugin" type="application/x-webkit-test-netscape" onSetWindow="handleSetWindow()">
-<script>
-    var plugIn = document.getElementById("plugin");
-    var count = 0;
-
-    if (window.testRunner)
-        testRunner.dumpAsText();
-
-    function handleSetWindow()
-    {
-        count++;
-
-        if (count == 2)
-            plugIn.style.width = "500px";
-        else if (count == 3)
-            plugIn.parentNode.removeChild(plugIn);
-    }
-
-    handleSetWindow();
-</script>