remove winrand.c entirely, nothing seems to reference it

/*

 * Copyright 1998-2016 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the OpenSSL license (the "License").  You may not use

 * this file except in compliance with the License.  You can obtain a copy

 * in the file LICENSE in the source distribution or at

 * https://www.openssl.org/source/license.html

 */

/*-

 * Usage: winrand [filename]

 *

 * Collects entropy from mouse movements and other events and writes

 * random data to filename or .rnd

 */

#include <windows.h>

#include <openssl/opensslv.h>

#include <openssl/rand.h>

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

const char *filename;

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,

                   PSTR cmdline, int iCmdShow)

{

    static char appname[] = "OpenSSL";

    HWND hwnd;

    MSG msg;

    WNDCLASSEX wndclass;

    char buffer[200];

    if (cmdline[0] == '\0')

        filename = RAND_file_name(buffer, sizeof buffer);

    else

        filename = cmdline;

    RAND_load_file(filename, -1);

    wndclass.cbSize = sizeof(wndclass);

    wndclass.style = CS_HREDRAW | CS_VREDRAW;

    wndclass.lpfnWndProc = WndProc;

    wndclass.cbClsExtra = 0;

    wndclass.cbWndExtra = 0;

    wndclass.hInstance = hInstance;

    wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);

    wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);

    wndclass.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);

    wndclass.lpszMenuName = NULL;

    wndclass.lpszClassName = appname;

    wndclass.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

    RegisterClassEx(&wndclass);

    hwnd = CreateWindow(appname, OPENSSL_VERSION_TEXT,

                        WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT,

                        CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance,

                        NULL);

    ShowWindow(hwnd, iCmdShow);

    UpdateWindow(hwnd);

    while (GetMessage(&msg, NULL, 0, 0)) {

        TranslateMessage(&msg);

        DispatchMessage(&msg);

    }

    return msg.wParam;

}

LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)

{

    HDC hdc;

    PAINTSTRUCT ps;

    RECT rect;

    static int seeded = 0;

    switch (iMsg) {

    case WM_PAINT:

        hdc = BeginPaint(hwnd, &ps);

        GetClientRect(hwnd, &rect);

        DrawText(hdc, "Seeding the PRNG. Please move the mouse!", -1,

                 &rect, DT_SINGLELINE | DT_CENTER | DT_VCENTER);

        EndPaint(hwnd, &ps);

        return 0;

    case WM_DESTROY:

        PostQuitMessage(0);

        return 0;

    }

    return DefWindowProc(hwnd, iMsg, wParam, lParam);

}