[Fetch] Unship Request.context

LayoutTests/http/tests/fetch/chromium/error-messages.html

Index: LayoutTests/http/tests/fetch/chromium/error-messages.html
diff --git a/LayoutTests/http/tests/fetch/chromium/error-messages.html b/LayoutTests/http/tests/fetch/chromium/error-messages.html
index a4e1163784b439affd5f374934a129238e2fd49c..c153cef2cde43793c06e2c72aef290b592fb086f 100644
--- a/LayoutTests/http/tests/fetch/chromium/error-messages.html
+++ b/LayoutTests/http/tests/fetch/chromium/error-messages.html
@@ -42,12 +42,4 @@ promise_test(function(t) {
     return fetch('http://localhost:8000/fetch/resources/redirect-loop.php?Count=100&ACAOrigin=*')
       .then(t.unreached_func('must reject'), function() {});
   }, 'A didFailRedirectCheck() error should output an error message');
-
-promise_test(function(t) {
-    return Promise.resolve()
-      .then(function() {
-          var request = new Request('http://localhost/');
-          request.context;
-        });
-  }, 'A deprecation warning should be output for Request.context');
 </script>