remove accidental dedup code

Author: atharvas

src/ExpressionBuilder.jl

@@ -178,19 +178,6 @@ function strip_metadata(
     end
     return new_member
 end
-function strip_metadata(
-    member::PopMember, options::AbstractOptions, dataset::Dataset{T,L}
-) where {T,L}
-    return PopMember(
-        strip_metadata(member.tree, options, dataset),
-        member.cost,
-        member.loss,
-        nothing;
-        member.ref,
-        member.parent,
-        deterministic=options.deterministic,
-    )
-end
 function strip_metadata(
     member::PopMember{T,L,N}, options::AbstractOptions, dataset::Dataset{T,L}
 ) where {T,L,N}