Remove unused `queries_predicates`

Since 213796fb, `queries_predicates` is no longer used.

activerecord/lib/active_record/relation/predicate_builder/array_handler.rb

@@ -9,7 +9,6 @@ def initialize(predicate_builder)
 
       def call(attribute, value)
         return attribute.in([]) if value.empty?
-        return queries_predicates(value) if value.all? { |v| v.is_a?(Hash) }
 
         values = value.map { |x| x.is_a?(Base) ? x.id : x }
         nils, values = values.partition(&:nil?)
@@ -44,17 +43,6 @@ def self.or(other)
             other
           end
         end
-
-      private
-        def queries_predicates(queries)
-          if queries.size > 1
-            queries.map do |query|
-              Arel::Nodes::And.new(predicate_builder.build_from_hash(query))
-            end.inject(&:or)
-          else
-            predicate_builder.build_from_hash(queries.first)
-          end
-        end
     end
   end
 end