[libc] Remove dependency on `cpp::function` in `rpc.h` (#112422)

Summary:
I'm going to attempt to move the `rpc.h` header to a separate folder
that we can install and include outside of `libc`. Before doing this I'm
going to try to trim up the file so there's not as many things I need to
copy to make it work. This dependency on `cpp::functional` is a low
hanging fruit. I only did it so that I could overload the argument of
the work function so that passing the id was optional in the lambda,
that's not a *huge* deal and it makes it more explicit I suppose.

1 files changed, 2 insertions, 2 deletions

diff --git a/libc/src/stdio/gpu/fopen.cpp b/libc/src/stdio/gpu/fopen.cpp
index 76daece..e165d2a 100644
--- a/libc/src/stdio/gpu/fopen.cpp
+++ b/libc/src/stdio/gpu/fopen.cpp
@@ -21,10 +21,10 @@ LLVM_LIBC_FUNCTION(::FILE *, fopen,
   rpc::Client::Port port = rpc::client.open<RPC_OPEN_FILE>();
   port.send_n(path, internal::string_length(path) + 1);
   port.send_and_recv(
-      [=](rpc::Buffer *buffer) {
+      [=](rpc::Buffer *buffer, uint32_t) {
         inline_memcpy(buffer->data, mode, internal::string_length(mode) + 1);
       },
-      [&](rpc::Buffer *buffer) { file = buffer->data[0]; });
+      [&](rpc::Buffer *buffer, uint32_t) { file = buffer->data[0]; });
   port.close();
 
   return reinterpret_cast<FILE *>(file);