removes a unnecessary limit call

We are setting a limit unconditionally just below,
which overrides any existing one anyway.

activerecord/lib/active_record/relation/batches.rb

@@ -205,7 +205,6 @@ def in_batches(of: 1000, start: nil, finish: nil, load: false, error_on_ignore:
       if limit_value
         remaining   = limit_value
         batch_limit = remaining if remaining < batch_limit
-        relation    = relation.limit(nil) # new relation without the limit
       end
 
       relation = relation.reorder(batch_order).limit(batch_limit)