patch 7.4.1008
Problem: The OS/2 code pollutes the source while nobody uses it these days.
Solution: Drop the support for OS/2.
diff --git a/src/option.h b/src/option.h
index d994d2d..7da6b8a 100644
--- a/src/option.h
+++ b/src/option.h
@@ -671,7 +671,7 @@
#ifdef FEAT_MZSCHEME
EXTERN long p_mzq; /* 'mzquantum */
#endif
-#if defined(MSDOS) || defined(MSWIN) || defined(OS2)
+#if defined(MSDOS) || defined(MSWIN)
EXTERN int p_odev; /* 'opendevice' */
#endif
EXTERN char_u *p_opfunc; /* 'operatorfunc' */