patch 8.1.1103: MS-Windows: old API calls are no longer needed

Problem:    MS-Windows: old API calls are no longer needed.
Solution:   Always use the wide functions. (Ken Takata, closes #4199)
diff --git a/src/glbl_ime.cpp b/src/glbl_ime.cpp
index 1661990..6fd84ec 100644
--- a/src/glbl_ime.cpp
+++ b/src/glbl_ime.cpp
@@ -133,14 +133,7 @@
 
     if (pIApp == NULL || pIApp->OnDefWindowProc(hWnd, Msg,
 					    wParam, lParam, &lResult) != S_OK)
-    {
-#if defined(MSWIN)
-	if (wide_WindowProc)
-	    lResult = DefWindowProcW(hWnd, Msg, wParam, lParam);
-	else
-#endif
-	    lResult = DefWindowProc(hWnd, Msg, wParam, lParam);
-    }
+	lResult = DefWindowProcW(hWnd, Msg, wParam, lParam);
     return lResult;
 }