Remove duplicate comment (microsoft#40667)

Author: TimvdLippe

src/compiler/builderState.ts

@@ -550,7 +550,6 @@ namespace ts {
                 }
             }
 
-            // Return array of values that needs emit
             // Return array of values that needs emit
             return arrayFrom(mapDefinedIterator(seenFileNamesMap.values(), value => value));
         }