manifest: remove unused 'pf is None' case
diff --git a/pym/portage/manifest.py b/pym/portage/manifest.py
index ef1a552..4fd44b0 100644
--- a/pym/portage/manifest.py
+++ b/pym/portage/manifest.py
@@ -376,8 +376,6 @@
 		if not filename.endswith(".ebuild"):
 			return None
 		pf = filename[:-7]
-		if pf is None:
-			return None
 		ps = portage.versions._pkgsplit(pf)
 		cpv = "%s/%s" % (cat, pf)
 		if not ps: