Kernel/IPC: Remove dead buffer translation code.

This is all implemented elsewhere, HLERequestContext for HLE requests, and svcReplyAndReceive for LLE requests.

src/core/hle/kernel/server_session.h

@@ -104,13 +104,4 @@ private:
     static ResultVal<SharedPtr<ServerSession>> Create(std::string name = "Unknown");
 };
 
-/**
- * Performs command buffer translation for an HLE IPC request.
- * The command buffer from the ServerSession thread's TLS is copied into a
- * buffer and all descriptors in the buffer are processed.
- * TODO(Subv): Implement this function, currently we do not support multiple processes running at
- * once, but once that is implemented we'll need to properly translate all descriptors
- * in the command buffer.
- */
-ResultCode TranslateHLERequest(ServerSession* server_session);
 }