Can one remove in Admin the “File Name” and “Size” from Photos Field?

Yes, by adding the following CSS:
.drts-wp-upload-current table td:nth-child(3), .drts-wp-upload current table th:nth-child(3), .drts-wp-upload-current table td:nth-child(4), .drts-wp-upload-current table th:nth-child(4) {
display: none;
}

To apply this on the admin side see this David Walsh article.