service worker: Remove some LayoutTests that are redundant with WPT tests.

third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/fetch-request-no-freshness-headers-worker.js

Index: third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/fetch-request-no-freshness-headers-worker.js
diff --git a/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/fetch-request-no-freshness-headers-worker.js b/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/fetch-request-no-freshness-headers-worker.js
deleted file mode 100644
index 2bd59d739225521c863b2fc0c2f87070859e2bd4..0000000000000000000000000000000000000000
--- a/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/fetch-request-no-freshness-headers-worker.js
+++ /dev/null
@@ -1,18 +0,0 @@
-var requests = [];
-
-self.addEventListener('message', function(event) {
-    event.data.port.postMessage({requests: requests});
-  });
-
-self.addEventListener('fetch', function(event) {
-    var url = event.request.url;
-    var headers = [];
-    for (var header of event.request.headers) {
-      headers.push(header);
-    }
-    requests.push({
-        url: url,
-        headers: headers
-      });
-    event.respondWith(fetch(event.request));
-  });