[newlib-cygwin] newlib: libm: drop unused config.h.in file

[Michael Frysinger]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=5420733ef33819384737a3ef09926253502d4d66

commit 5420733ef33819384737a3ef09926253502d4d66
Author: Mike Frysinger <vapier@gentoo.org>
Date:   Sun Jan 23 22:46:59 2022 -0500

    newlib: libm: drop unused config.h.in file
    
    Not sure how this snuck in.  It's never been used in libm/, so punt it.

Diff:
---
 newlib/libm/config.h.in | 1 -
 1 file changed, 1 deletion(-)

diff --git a/newlib/libm/config.h.in b/newlib/libm/config.h.in
deleted file mode 100644
index 61025bcef..000000000
--- a/newlib/libm/config.h.in
+++ /dev/null
@@ -1 +0,0 @@
-/* config.h.in.  Generated automatically from configure.in by autoheader.  */