SDL: Fixed build error (a5a18)

SDL Commits
1 
From a5a1844681d87950db50a39bc2b359d45bc7b08d Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Fri, 2 Jun 2023 10:20:29 -0700
Subject: [PATCH] Fixed build error

---
 src/video/windows/SDL_windowsmodes.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/video/windows/SDL_windowsmodes.c b/src/video/windows/SDL_windowsmodes.c
index 50fa93e0bf11..05f3e1d64934 100644
--- a/src/video/windows/SDL_windowsmodes.c
+++ b/src/video/windows/SDL_windowsmodes.c
@@ -321,7 +321,6 @@ static char *WIN_GetDisplayNameVista(const WCHAR *deviceName)
 static void WIN_AddDisplay(SDL_VideoDevice *_this, HMONITOR hMonitor, const MONITORINFOEXW *info, int *display_index)
 {
     int i, index = *display_index;
-    SDL_DisplayID displayID;
     SDL_VideoDisplay display;
     SDL_DisplayData *displaydata;
     SDL_DisplayMode mode;
@@ -404,7 +403,7 @@ static void WIN_AddDisplay(SDL_VideoDevice *_this, HMONITOR hMonitor, const MONI
     display.device = _this;
     display.driverdata = displaydata;
     WIN_GetDisplayBounds(_this, &display, &displaydata->bounds);
-    displayID = SDL_AddVideoDisplay(&display, SDL_FALSE);
+    SDL_AddVideoDisplay(&display, SDL_FALSE);
     SDL_free(display.name);
 
 done: