Removed unused forward declarations in Win32 impl.
diff --git a/backends/imgui_impl_win32.cpp b/backends/imgui_impl_win32.cpp
index bce3fa7..a15fc98 100644
--- a/backends/imgui_impl_win32.cpp
+++ b/backends/imgui_impl_win32.cpp
@@ -97,8 +97,6 @@
 static void ImGui_ImplWin32_InitPlatformInterface();
 static void ImGui_ImplWin32_ShutdownPlatformInterface();
 static void ImGui_ImplWin32_UpdateMonitors();
-static void ImGui_ImplWin32_SetWindowFocus(ImGuiViewport* viewport);
-static void ImGui_ImplWin32_ShowWindow(ImGuiViewport* viewport);
 
 struct ImGui_ImplWin32_Data
 {