fix push swap readme

subjects/push-swap/push-swap.en.md

@@ -55,24 +55,17 @@ Exec pb pb pb :
 = =
 a b
 ---------------------------------------
-Exec ra rb (equivalent to rr):
+Exec rb :
-8 2
+6 2
-5 1
+8 1
-6 3
+5 3
 = =
 a b
 ---------------------------------------
 Exec rra and rrb (equivalent to rrr):
-6 3
+5 3
-8 2
-5 1
-= =
-a b
----------------------------------------
-Exec sa:
-8 3
 6 2
-5 1
+8 1
 = =
 a b
 ---------------------------------------