assets/admin/deposits: Remove deposits filtering by user for non staff

The deposits admin view is read only and there is no sensitive data
displayed here so we can remove the deposits filtering by username
for non staff users but with adequate permission.

assets/src/bundles/admin/deposit.js

@@ -62,9 +62,6 @@ export function initDepositAdmin(username, isStaff) {
           url: Urls.admin_deposit_list(),
           data: d => {
             d.excludePattern = $('#swh-admin-deposit-list-exclude-filter').val();
-            if (!isStaff) {
-              d.username = username;
-            }
           }
         },
         columns: [