Remove leftover of attrib plugin build
diff --git a/Makefile.am b/Makefile.am
index 552c81d..caffbe2 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -385,7 +385,7 @@
 
 pkgconfig_DATA = bluez.pc
 
-DISTCHECK_CONFIGURE_FLAGS = --disable-udevrules --enable-attrib
+DISTCHECK_CONFIGURE_FLAGS = --disable-udevrules
 
 DISTCLEANFILES = $(pkgconfig_DATA)