Remove --enable-dwz. dwz alt debug is no longer experimental.

Signed-off-by: Mark Wielaard <mjw@redhat.com>
diff --git a/Makefile.am b/Makefile.am
index aa554e6..d044a7c 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -35,7 +35,7 @@
 # Run all tests under valgrind.
 DISTCHECK_CONFIGURE_FLAGS = \
 	--libdir=`echo $(libdir) | sed "s,^$(exec_prefix),$$dc_install_base,"`\
-	--enable-valgrind --enable-dwz \
+	--enable-valgrind \
 	CC="$(CC)"
 
 distcheck-hook: