Remove unused variable warning from Emscripten build in Emscripten_HandleFullscreenChange().
diff --git a/src/video/emscripten/SDL_emscriptenevents.c b/src/video/emscripten/SDL_emscriptenevents.c
index f474689..ca24fe0 100644
--- a/src/video/emscripten/SDL_emscriptenevents.c
+++ b/src/video/emscripten/SDL_emscriptenevents.c
@@ -507,7 +507,6 @@ Emscripten_HandleFullscreenChange(int eventType, const EmscriptenFullscreenChang
SDL_WindowData *window_data = userData;
if(fullscreenChangeEvent->isFullscreen)
{
- SDL_bool is_desktop_fullscreen;
window_data->window->flags |= window_data->requested_fullscreen_mode;
window_data->requested_fullscreen_mode = 0;