[newlib-cygwin] Cygwin: drop unused CYGWIN_VERSION_CYGWIN_CONV macro

[Corinna Vinschen]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=c41f0e700a4865ed1bf23621e9c76343ae5f8587

commit c41f0e700a4865ed1bf23621e9c76343ae5f8587
Author: Corinna Vinschen <corinna@vinschen.de>
Date:   Wed Aug 3 16:09:00 2022 +0200

    Cygwin: drop unused CYGWIN_VERSION_CYGWIN_CONV macro
    
    Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

Diff:
---
 winsup/cygwin/include/cygwin/version.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/winsup/cygwin/include/cygwin/version.h b/winsup/cygwin/include/cygwin/version.h
index 8f37f4b25..e5a861f8f 100644
--- a/winsup/cygwin/include/cygwin/version.h
+++ b/winsup/cygwin/include/cygwin/version.h
@@ -40,8 +40,6 @@ details. */
 #define CYGWIN_VERSION_CHECK_FOR_EXTRA_TM_MEMBERS \
   (CYGWIN_VERSION_USER_API_VERSION_COMBINED >= 272)
 
-#define CYGWIN_VERSION_CYGWIN_CONV 181
-
 /* API_MAJOR 0.0: Initial version.  API_MINOR changes:
     1: Export cygwin32_ calls as cygwin_ as well.
     2: Export j1, jn, y1, yn.