Scala: drop elements in Sequence
Follow the naming convention of the language
For scala, this is here. Spell methods and variables in lower camel case:
drop_Val_In_List
drop_Val_List_In_List
in_ls

Use the most appropriate data structure
To me, it seems like you want a set, not a sequence/list. Set also has the method you want:
val KeepCols = Set(&quot;id&quot;, &quot;type&quot;, &quot;month&quot;, &quot;car&quot;, &quot;road&quot;)
val tmp = KeepCols.diff(Set(&quot;id&quot;, &quot;type&quot;, &quot;month&quot;))

If you don't want to use a set, Seq also has diff.