Geocoder_field and geocoder_geofield use PHP 5.6 version of function array_filter

Both geocoder_field and geocoder_geofield use the PHP-function array_filter() with three arguments. This is only possible with PHP 5.6+ though this use is not required.

Proposed solution is a simplification which uses array_filter() with two arguments. This is possible with PHP 5.5.9, the minimum requirement for D8.