[newlib-cygwin] Cygwin: Drop AC_SUBST(LIBSERVER)

[Jon TURNEY <jturney@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=66c76e8aff7c58456fa6a0aad295b920d5c7454d

commit 66c76e8aff7c58456fa6a0aad295b920d5c7454d
Author: Jon Turney <jon.turney@dronecode.org.uk>
Date:   Mon Oct 12 14:27:55 2020 +0100

    Cygwin: Drop AC_SUBST(LIBSERVER)
    
    The autoconf variable LIBSERVER isn't defined, and it's value isn't
    used. (The Makefile.in contains a literal value for the name of this
    library instead).

Diff:
---
 winsup/cygwin/configure    | 2 --
 winsup/cygwin/configure.ac | 1 -
 2 files changed, 3 deletions(-)

diff --git a/winsup/cygwin/configure b/winsup/cygwin/configure
index ff80f0c55..ce1749399 100755
--- a/winsup/cygwin/configure
+++ b/winsup/cygwin/configure
@@ -593,7 +593,6 @@ DIN_FILE
 DEF_DLL_ENTRY
 DLL_ENTRY
 DLL_NAME
-LIBSERVER
 configure_args
 WINDRES
 STRIP
@@ -4437,7 +4436,6 @@ configure_args=$(/usr/bin/expr "$configure_args" : 'X \(.*\)')
 
 
 
-
 ac_config_files="$ac_config_files Makefile"
 
 cat >confcache <<\_ACEOF
diff --git a/winsup/cygwin/configure.ac b/winsup/cygwin/configure.ac
index 757ebcfb0..32862d7e5 100644
--- a/winsup/cygwin/configure.ac
+++ b/winsup/cygwin/configure.ac
@@ -86,7 +86,6 @@ case "$target_cpu" in
 esac
 
 AC_CONFIGURE_ARGS
-AC_SUBST(LIBSERVER)
 AC_SUBST(DLL_NAME)
 AC_SUBST(DLL_ENTRY)
 AC_SUBST(DEF_DLL_ENTRY)