chore: remove export_fetchapi... patch (#23067)

patches/chromium/.patches

@@ -71,7 +71,6 @@ allow_new_privileges_in_unsandboxed_child_processes.patch
 expose_setuseragent_on_networkcontext.patch
 feat_add_set_theme_source_to_allow_apps_to.patch
 revert_cleanup_remove_menu_subtitles_sublabels.patch
-export_fetchapi_mojo_traits_to_fix_component_build.patch
 add_webmessageportconverter_entangleandinjectmessageportchannel.patch
 revert_remove_contentrendererclient_shouldfork.patch
 ignore_rc_check.patch

patches/chromium/export_fetchapi_mojo_traits_to_fix_component_build.patch

@@ -1,36 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Jeremy Apthorp <jeremya@chromium.org>
-Date: Fri, 20 Sep 2019 16:44:18 -0400
-Subject: export FetchAPI mojo traits to fix component build
-
-Without these, we get link errors in the component build when using the
-blink::CloneableMessage mojo traits.
-
-diff --git a/third_party/blink/public/common/fetch/fetch_api_request_body_mojom_traits.h b/third_party/blink/public/common/fetch/fetch_api_request_body_mojom_traits.h
-index 1ddfc2108f9a0104247ea2559b597552cd20a342..f9a10b5b428e29a8824b87616f19292b38e38024 100644
---- a/third_party/blink/public/common/fetch/fetch_api_request_body_mojom_traits.h
-+++ b/third_party/blink/public/common/fetch/fetch_api_request_body_mojom_traits.h
-@@ -11,12 +11,13 @@
- #include "mojo/public/cpp/bindings/pending_remote.h"
- #include "services/network/public/cpp/resource_request_body.h"
- #include "services/network/public/mojom/url_loader.mojom-forward.h"
-+#include "third_party/blink/public/common/common_export.h"
- #include "third_party/blink/public/mojom/fetch/fetch_api_request.mojom-forward.h"
- 
- namespace mojo {
- 
- template <>
--struct StructTraits<blink::mojom::FetchAPIRequestBodyDataView,
-+struct BLINK_COMMON_EXPORT StructTraits<blink::mojom::FetchAPIRequestBodyDataView,
-                     scoped_refptr<network::ResourceRequestBody>> {
-   static bool IsNull(const scoped_refptr<network::ResourceRequestBody>& r) {
-     return !r;
-@@ -46,7 +47,7 @@ struct StructTraits<blink::mojom::FetchAPIRequestBodyDataView,
- };
- 
- template <>
--struct StructTraits<blink::mojom::FetchAPIDataElementDataView,
-+struct BLINK_COMMON_EXPORT StructTraits<blink::mojom::FetchAPIDataElementDataView,
-                     network::DataElement> {
-   static const network::mojom::DataElementType& type(
-       const network::DataElement& element) {