patch 8.0.0281: some files are still using ARGSUSED instead of UNUSED

Problem:    MS-Windows files are still using ARGSUSED while most other files
            have UNUSED.
Solution:   Change ARGSUSED to UNUSED or delete it.

src/os_mswin.c

@@ -306,10 +306,8 @@ mch_settitle(
  *  2: Just restore icon (which we don't have)
  *  3: Restore title and icon (which we don't have)
  */
-/*ARGSUSED*/
     void
-mch_restore_title(
-    int which)
+mch_restore_title(int which UNUSED)
 {
 #ifndef FEAT_GUI_MSWIN
     SetConsoleTitle(g_szOrigTitle);
@@ -345,13 +343,12 @@ mch_can_restore_icon(void)
  * When 'shellslash' set do it the other way around.
  * Return OK or FAIL.
  */
-/*ARGSUSED*/
     int
 mch_FullName(
     char_u	*fname,
     char_u	*buf,
     int		len,
-    int		force)
+    int		force UNUSED)
 {
     int		nResult = FAIL;
 
@@ -636,9 +633,8 @@ vim_stat(const char *name, stat_T *stp)
 }
 
 #if defined(FEAT_GUI_MSWIN) || defined(PROTO)
-/*ARGSUSED*/
     void
-mch_settmode(int tmode)
+mch_settmode(int tmode UNUSED)
 {
     /* nothing to do */
 }
@@ -817,10 +813,8 @@ mch_char_avail(void)
 /*
  * set screen mode, always fails.
  */
-/*ARGSUSED*/
     int
-mch_screenmode(
-    char_u *arg)
+mch_screenmode(char_u *arg UNUSED)
 {
     EMSG(_(e_screenmode));
     return FAIL;
@@ -996,10 +990,8 @@ mch_libcall(
 /*
  * Debugging helper: expose the MCH_WRITE_DUMP stuff to other modules
  */
-/*ARGSUSED*/
     void
-DumpPutS(
-    const char *psz)
+DumpPutS(const char *psz UNUSED)
 {
 # ifdef MCH_WRITE_DUMP
     if (fdDump)
@@ -1173,9 +1165,12 @@ swap_me(COLORREF colorref)
 # define PDP_RETVAL INT_PTR
 #endif
 
-/*ARGSUSED*/
     static PDP_RETVAL CALLBACK
-PrintDlgProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
+PrintDlgProc(
+	HWND hDlg,
+	UINT message,
+	WPARAM wParam UNUSED,
+	LPARAM lParam UNUSED)
 {
 #ifdef FEAT_GETTEXT
     NONCLIENTMETRICS nm;
@@ -1236,9 +1231,8 @@ PrintDlgProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
     return FALSE;
 }
 
-/*ARGSUSED*/
     static BOOL CALLBACK
-AbortProc(HDC hdcPrn, int iCode)
+AbortProc(HDC hdcPrn UNUSED, int iCode UNUSED)
 {
     MSG msg;
 
@@ -1683,9 +1677,8 @@ mch_print_begin(prt_settings_T *psettings)
     return (ret > 0);
 }
 
-/*ARGSUSED*/
     void
-mch_print_end(prt_settings_T *psettings)
+mch_print_end(prt_settings_T *psettings UNUSED)
 {
     EndDoc(prt_dlg.hDC);
     if (!*bUserAbort)
@@ -2764,12 +2757,11 @@ points_to_pixels(char_u *str, char_u **end, int vertical, long_i pprinter_dc)
     return pixels;
 }
 
-/*ARGSUSED*/
     static int CALLBACK
 font_enumproc(
     ENUMLOGFONT	    *elf,
-    NEWTEXTMETRIC   *ntm,
-    int		    type,
+    NEWTEXTMETRIC   *ntm UNUSED,
+    int		    type UNUSED,
     LPARAM	    lparam)
 {
     /* Return value: