Remove tab-related text

tests/snapshots/output/plain.snapshot.txt

@@ -20,17 +20,3 @@ fn area(rectangle: &Rectangle) -> u32 {
 fn perimeter(rectangle: &Rectangle) -> u32 {
     (rectangle.width + rectangle.height) * 2
 }
-
-// Tab alignment:
-/*
-	Indent
-	1	2	3	4
-1	?
-22	?
-333	?
-4444	?
-55555	?
-666666	?
-7777777	?
-88888888	?
-*/