[setup] Remove "" from packages

We should never install any module in the root.
diff --git a/setup.py b/setup.py
index 4046e13..9b66088 100755
--- a/setup.py
+++ b/setup.py
@@ -71,7 +71,6 @@
 		long_description = long_description,
 		
 		packages = [
-			"",
 			"fontTools",
 			"fontTools.encodings",
 			"fontTools.misc",