[merge] Minor
diff --git a/Lib/fontTools/merge.py b/Lib/fontTools/merge.py
index 5b225c7..848b0a9 100644
--- a/Lib/fontTools/merge.py
+++ b/Lib/fontTools/merge.py
@@ -706,9 +706,6 @@
 		# Right now we don't use self at all.  Will use in the future
 		# for options and logging.
 
-		if logic is NotImplemented:
-			return NotImplemented
-
 		allKeys = set.union(set(), *(vars(table).keys() for table in tables if table is not NotImplemented))
 		for key in allKeys:
 			try: