fix liquid error, use only 1 tab

Author: bishabosha

Diff for: _tour/named-arguments.md

@@ -8,28 +8,16 @@ next-page: traits
 previous-page: default-parameter-values
 prerequisite-knowledge: function-syntax
 
-redirect_from: 
+redirect_from:
   - "/tutorials/tour/named-arguments.html"
   - "/tutorials/tour/named-parameters.html"
 ---
 
 When calling methods, you can label the arguments with their parameter names like so:
 
-{% tabs named-arguments-when-good class=tabs-scala-version %}
+{% tabs named-arguments-when-good %}
 
-{% tab 'Scala 2' for=named-arguments-when-good %}
-```scala mdoc
-def printName(first: String, last: String): Unit = {
-  println(first + " " + last)
-}
-
-printName("John", "Smith")  // Prints "John Smith"
-printName(first = "John", last = "Smith")  // Prints "John Smith"
-printName(last = "Smith", first = "John")  // Prints "John Smith"
-```
-{% endtab %}
-
-{% tab 'Scala 3' for=named-arguments-when-good %}
+{% tab 'Scala 2 and 3' for=named-arguments-when-good %}
 ```scala mdoc
 def printName(first: String, last: String): Unit =
   println(first + " " + last)
@@ -44,7 +32,7 @@ printName(last = "Smith", first = "John")  // Prints "John Smith"
 
 Notice how the order of named arguments can be rearranged. However, if some arguments are named and others are not, the unnamed arguments must come first and in the order of their parameters in the method signature.
 
-{% tabs scala-2-and-3-demo %}
+{% tabs named-arguments-when-error %}
 
 {% tab 'Scala 2 and 3' for=named-arguments-when-error %}
 ```scala mdoc:fail