Do not `binds.dup` in `connection#to_sql`

Because `connection#to_sql` does not mutate `binds`.

activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb

@@ -10,7 +10,7 @@ def initialize
       def to_sql(arel, binds = [])
         if arel.respond_to?(:ast)
           collected = visitor.accept(arel.ast, collector)
-          collected.compile(binds.dup, self)
+          collected.compile(binds, self)
         else
           arel
         end