remove winrand.c entirely, nothing seems to reference it

Reviewed-by: NMatt Caswell <matt@openssl.org>
Reviewed-by: NTim Hudson <tjh@openssl.org>
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1079)

apps/winrand.c

-/*
- * 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);
-}