bootstub: cleanup the leftover files symlink

	deleted:    files

Review URL: http://codereview.chromium.org/2851019
diff --git a/files b/files
deleted file mode 120000
index 945c9b4..0000000
--- a/files
+++ /dev/null
@@ -1 +0,0 @@
-.
\ No newline at end of file