remove bb_printf and the like
diff --git a/coreutils/dirname.c b/coreutils/dirname.c
index 3471a2631..e986a97 100644
--- a/coreutils/dirname.c
+++ b/coreutils/dirname.c
@@ -22,5 +22,5 @@
 
 	puts(dirname(argv[1]));
 
-	bb_fflush_stdout_and_exit(EXIT_SUCCESS);
+	fflush_stdout_and_exit(EXIT_SUCCESS);
 }