Clear windows branch; preserve previous contents in win-old

tools/d4r_win32_wait.h

@@ -1,23 +0,0 @@
-#pragma once
-#include <windows.h>
-#include <cstdint>
-
-// MinGW's Win32 std::sleep_for can truncate submillisecond durations to zero.
-// NtDelayExecution retains 100 ns precision and actually sleeps under Wine.
-inline void d4r_sleep_us(unsigned int microseconds)
-{
-    using Delay = LONG(WINAPI*)(BOOLEAN, LARGE_INTEGER*);
-    static const auto delay = reinterpret_cast<Delay>(reinterpret_cast<void*>(
-        GetProcAddress(GetModuleHandleW(L"ntdll.dll"), "NtDelayExecution")));
-    if (microseconds == 0)
-    {
-        SwitchToThread();
-        return;
-    }
-    LARGE_INTEGER interval;
-    interval.QuadPart = -static_cast<LONGLONG>(microseconds) * 10;
-    if (delay != nullptr && delay(FALSE, &interval) >= 0)
-        return;
-    // A rounded-up millisecond wait still releases the CPU if ntdll is absent.
-    Sleep(static_cast<DWORD>((static_cast<uint64_t>(microseconds) + 999) / 1000));
-}