[newlib-cygwin] newlib: drop redundant CFLAGS export

[Michael Frysinger]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=4af35511360b00157ce6829ed0530b63d284dff8

commit 4af35511360b00157ce6829ed0530b63d284dff8
Author: Mike Frysinger <vapier@gentoo.org>
Date:   Thu Jan 20 23:57:43 2022 -0500

    newlib: drop redundant CFLAGS export
    
    This is already handled by autotools for us automatically.  You can
    tell as the generated output is exactly the same other than deleting
    a few blank lines.

Diff:
---
 newlib/configure    | 2 --
 newlib/configure.ac | 2 --
 2 files changed, 4 deletions(-)

diff --git a/newlib/configure b/newlib/configure
index 2aa297082..7fb49d7ed 100755
--- a/newlib/configure
+++ b/newlib/configure
@@ -13425,8 +13425,6 @@ $as_echo "#define _LDBL_EQ_DBL 1" >>confdefs.h
 
 fi
 
-
-
 ac_config_files="$ac_config_files Makefile"
 
 cat >confcache <<\_ACEOF
diff --git a/newlib/configure.ac b/newlib/configure.ac
index 8878e08e6..93dde7feb 100644
--- a/newlib/configure.ac
+++ b/newlib/configure.ac
@@ -712,7 +712,5 @@ if test $newlib_cv_ldbl_eq_dbl = yes; then
   AC_DEFINE(_LDBL_EQ_DBL, 1, [Define if the platform long double type is equal to double.])
 fi
 
-AC_SUBST(CFLAGS)
-
 AC_CONFIG_FILES([Makefile])
 AC_OUTPUT