Remove global Sleep(1) from uart_handle_read (#6)

This removes the global Sleep(1) workaround that was originally added to prevent memory leaks caused by tight polling loops.

While it helped with the mai2 memory leak, introducing artificial latency here negatively impacts other UART devices (e.g., breaking slider inputs in chusan). The proper fix has now been implemented downstream in `segatools` by rate-limiting the specific `led15070` board instead. Therefore, this global hack is no longer needed and can be safely removed.

Reviewed-on: https://gitea.tendokyu.moe/TeamTofuShop/capnhook/pulls/6
Co-authored-by: Gl0w1amp <gl0w1amp@noreply.gitea.tendokyu.moe>
Co-committed-by: Gl0w1amp <gl0w1amp@noreply.gitea.tendokyu.moe>

hooklib/uart.c

@@ -200,9 +200,6 @@ static HRESULT uart_handle_read(struct uart *uart, struct irp *irp)
     int requested = irp->read.nbytes;
 
     if (uart->readable.pos < requested && uart->readable.pos == 0) {
-        /* Avoid a tight polling loop which causes performance issues 
-           and massive memory leaks. Simulate hardware I/O latency. */
-        Sleep(1);
         return E_PENDING;
     }