Remove Windows support from the EDK.

mojo/edk/embedder/embedder.h

Index: mojo/edk/embedder/embedder.h
diff --git a/mojo/edk/embedder/embedder.h b/mojo/edk/embedder/embedder.h
index 2514c7c72de224662535846aefb23ba5baccb68a..5e1d984516797aefce0a214184313246582133c2 100644
--- a/mojo/edk/embedder/embedder.h
+++ b/mojo/edk/embedder/embedder.h
@@ -168,9 +168,8 @@ ConnectToMaster(const std::string& platform_connection_id,
 //
 // Both creation functions have a |platform_handle| argument, which should be an
 // OS-dependent handle to one side of a suitable bidirectional OS "pipe" (e.g.,
-// a file descriptor to a socket on POSIX, a handle to a named pipe on Windows);
-// this "pipe" should be connected and ready for operation (e.g., to be written
-// to or read from).
+// a file descriptor to a Unix domain socket); this "pipe" should be connected
+// and ready for operation (e.g., to be written to or read from).
 //
 // Both (synchronously) return a handle to the bootstrap message pipe on the
 // channel that was (or is to be) created, or |MOJO_HANDLE_INVALID| on error