[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, 3 insertions, 2 deletions

diff --git a/libc/src/stdlib/gpu/system.cpp b/libc/src/stdlib/gpu/system.cpp
index acf3a8c..1890006 100644
--- a/libc/src/stdlib/gpu/system.cpp
+++ b/libc/src/stdlib/gpu/system.cpp
@@ -19,8 +19,9 @@ LLVM_LIBC_FUNCTION(int, system, (const char *command)) {
   int ret;
   rpc::Client::Port port = rpc::client.open<RPC_SYSTEM>();
   port.send_n(command, internal::string_length(command) + 1);
-  port.recv(
-      [&](rpc::Buffer *buffer) { ret = static_cast<int>(buffer->data[0]); });
+  port.recv([&](rpc::Buffer *buffer, uint32_t) {
+    ret = static_cast<int>(buffer->data[0]);
+  });
   port.close();
 
   return ret;