Remove unnecessary comment

Author: Tahanima

Database/Easy/627_SwapSalary.sql

@@ -1,7 +1,5 @@
-# Write your MySQL query statement below
-
 UPDATE salary
 SET sex = (CASE WHEN sex = 'm' THEN 'f' 
                 WHEN sex = 'f' THEN 'm' ELSE
                 'a'
-           END);
+           END);