Update concepts/switch-statement/about.md

Co-authored-by: Kah Goh <[email protected]>

Author: josealonso

concepts/switch-statement/about.md

@@ -145,7 +145,6 @@ Starting with Java 14 (available as a preview before in Java 12 and 13) it is po
    However if you use the new `->` notation it must be followed by either: a single statement/expression, a `throw` statement or a `{}` block.
    No more confusion!
 
-The first LTS (Long Term Support) version that had these improvements was Java 17, released on September, 2021.
 
 In addition, a feature called `Guarded Patterns` was added, which allows you to do checks in the case label itself.