This plugin is for use with the Exifography plugin. It removes location data from posts published between the start and end dates; it saves you having to update the metadata for the posts in the database. You can delete lines 14, 15, 16, 18 and 20 if you want to remove location from all posts.

exif-remove-location.php

<?php
/*
Plugin Name:  Exif remove location
Description:  Hide the location from Exifography for certain dates
Version:      20180403
Author:       kristarella
License:      GPL2
License URI:  https://www.gnu.org/licenses/gpl-2.0.html
*/

/* removes location as a field between the start and end dates */
function exif_unset_location($fields) {
  global $post;
  $start_date = strtotime( '2017-01-01' );
  $end_date = strtotime( '2017-12-31' );
  $post_date = strtotime( $post->post_date );

  if ($post_date > $start_date && $post_date < $end_date) {
    unset($fields['location']);
  }

  return $fields;

}
add_filter('exifography_display_exif','exif_unset_location');