Can we disable the search option in the custom field value selection area in project server 2013

Hi All,

In project server 2013 , we are getting a search option in the enterprise custom field (having look up table associated) value selection area as shown below.

This is very helpful in the case the look up value list is large. If we have only two or three values in the look up table, we may not need this search option.

So I would like to know whether we can disable this search option?

Thanks

Thanks, Rose