Remove duplicate service worker test

third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/onactivate-throw-error-then-prevent-default-worker.js

Index: third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/onactivate-throw-error-then-prevent-default-worker.js
diff --git a/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/onactivate-throw-error-then-prevent-default-worker.js b/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/onactivate-throw-error-then-prevent-default-worker.js
deleted file mode 100644
index d56c95113917d8f18a7b510d01c307373b88e5d2..0000000000000000000000000000000000000000
--- a/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/onactivate-throw-error-then-prevent-default-worker.js
+++ /dev/null
@@ -1,7 +0,0 @@
-// Ensure we can handle multiple error handlers. One error handler
-// calling preventDefault should cause the event to be treated as
-// handled.
-self.addEventListener('error', function(event) {});
-self.addEventListener('error', function(event) { event.preventDefault(); });
-self.addEventListener('error', function(event) {});
-self.addEventListener('activate', function(event) { throw new Error(); });