Remove unnecessary testRunner.dumpAsText in LayoutTests/fast/dom/shadow

LayoutTests/fast/dom/shadow/move-style-scoped-to-another-shadowroot-crash.html

Index: LayoutTests/fast/dom/shadow/move-style-scoped-to-another-shadowroot-crash.html
diff --git a/LayoutTests/fast/dom/shadow/move-style-scoped-to-another-shadowroot-crash.html b/LayoutTests/fast/dom/shadow/move-style-scoped-to-another-shadowroot-crash.html
index e07431b3884341202df08f84d281f6e94ed78061..52b2765a1d49075c48f4b65617d9ce01dd437292 100644
--- a/LayoutTests/fast/dom/shadow/move-style-scoped-to-another-shadowroot-crash.html
+++ b/LayoutTests/fast/dom/shadow/move-style-scoped-to-another-shadowroot-crash.html
@@ -4,9 +4,6 @@
 <script src="../../../resources/js-test.js"></script>
 <script src="resources/shadow-dom.js"></script>
 <script>
-if (window.testRunner)
-    testRunner.dumpAsText();
-
 description("Test for crbug.com/321495: if no crash occurs, this test passes. Otherwise, fails.");
 
 var youngerShadowRoot, olderShadowRoot, style;