Remove Windows support from the EDK.

mojo/edk/embedder/BUILD.gn

Index: mojo/edk/embedder/BUILD.gn
diff --git a/mojo/edk/embedder/BUILD.gn b/mojo/edk/embedder/BUILD.gn
index 1cc513c14be17db4cfaafead74e243e906077754..e7c740dcfeb37cbb1969e4158dbde777d23015e9 100644
--- a/mojo/edk/embedder/BUILD.gn
+++ b/mojo/edk/embedder/BUILD.gn
@@ -61,14 +61,12 @@ mojo_edk_source_set("platform") {
     "platform_channel_pair.cc",
     "platform_channel_pair.h",
     "platform_channel_pair_posix.cc",
-    "platform_channel_pair_win.cc",
     "platform_channel_utils_posix.cc",
     "platform_channel_utils_posix.h",
     "platform_handle.cc",
     "platform_handle.h",
     "platform_handle_utils.h",
     "platform_handle_utils_posix.cc",
-    "platform_handle_utils_win.cc",
     "platform_handle_vector.h",
     "platform_shared_buffer.h",
     "platform_support.h",
@@ -77,7 +75,6 @@ mojo_edk_source_set("platform") {
     "simple_platform_shared_buffer.h",
     "simple_platform_shared_buffer_android.cc",
     "simple_platform_shared_buffer_posix.cc",
-    "simple_platform_shared_buffer_win.cc",
     "simple_platform_support.cc",
     "simple_platform_support.h",
   ]