patch 7.4.2253
Problem:    Check for Windows 3.1 will always return false.  (Christian
            Brabandt)
Solution:   Remove the dead code.
diff --git a/src/os_win32.c b/src/os_win32.c
index 97a8cca..2773953 100644
--- a/src/os_win32.c
+++ b/src/os_win32.c
@@ -2062,7 +2062,6 @@
     Columns = 80;
 
     /* Look for 'vimrun' */
-    if (!gui_is_win32s())
     {
 	char_u vimrun_location[_MAX_PATH + 4];
 
@@ -4142,7 +4141,7 @@
      * Win32s either as it stops the synchronous spawn workaround working.
      * Don't activate the window to keep focus on Vim.
      */
-    if ((options & SHELL_DOOUT) && !mch_windows95() && !gui_is_win32s())
+    if ((options & SHELL_DOOUT) && !mch_windows95())
 	si.wShowWindow = SW_SHOWMINNOACTIVE;
     else
 	si.wShowWindow = SW_SHOWNORMAL;