Are you like "What were they thinking?" about submission information on webforms? Do you care about the submission date, user, and of all things, ip address of the submitter? I didn't think so. Well, here is a way to get rid of that unnecessary data taking up valuable screen real estate.

Assuming you already have the webform module installed, open /sites/all/modules/webform/webform_report.inc and copy the contents of the following two functions:

theme_webform_results_submissions_header and theme_webform_results_submissions

and paste into template.php replacing theme with your current theme name. Let's say your theme is named 'zen_garden'. The functions in template.php should then be called zen_garden_webform_results_submissions_header and zen_garden_webform_results_submissions respectively.

Comment out the unwanted elements.

/**
* Override theme_webform_results_submissions_header in /sites/all/modules/webform/webform_report.inc
*/
function zen_garden_webform_results_submissions_header($node) {
  $columns = array(
    array('data' => t('#'), 'field' => 'sid', 'sort' => 'asc'),
    //array('data' => t('Submitted'), 'field' => 'submitted'),
  );
/*
  if (user_access("access webform results")) {
    $columns[] = array('data' => t('User'), 'field' => 'name');
    $columns[] = array('data' => t('IP Address'), 'field' => 'remote_addr');
  }
*/
  $columns[] = array('data' => t('Operations'), 'colspan' => 3);

  return $columns;
}

/**
* Override theme_webform_results_submissions in /sites/all/modules/webform/webform_report.inc
*/
function zen_garden_webform_results_submissions($node, $submissions) {
  global $user;

  // This header has to be generated seperately so we can add the SQL necessary
  // to sort the results.
  $header = theme('webform_results_submissions_header', $node);

  $rows = array();
  foreach ($submissions as $sid => $submission) {
    $row = array(
      $sid,
      //format_date($submission->submitted, 'small'),
    );
/*
    if (user_access('access webform results')) {
      $row[] = theme('username', $submission);
      $row[] = $submission->remote_addr;
    }
*/
    $row[] = l(t('View'), "node/$node->nid/submission/$sid");
    ...

Now the three unwanted elements should not appear. Make sure you empty the cache if you don't see results.

Note that this method can also be applied to the theme_webform_results_table_header and theme_webform_results_table functions in /sites/all/modules/webform/webform_report.inc as well. Happy overrides!