remove unused 'RC_IS_WINDRES' variable in Autotools

The last use of this was removed in 520da9cd8b8d23007f325e84fdbda733d7e6d57c.

diff --git a/configure.ac b/configure.ac
index 1f0483994b6830ccb0bd7473ab20207132c00d53..b160fb6580a55ba5205ceeb32954d75f5d95e390 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -394,7 +394,6 @@ else
 fi
 
 AM_CONDITIONAL(RC_IS_RC, [test "x$RC" = "xrc"])
-AM_CONDITIONAL(RC_IS_WINDRES, [test "x$RC" = "xwindres"])
 
 # debug
 AC_ARG_ENABLE([debug],