You will need to modify the file {theme directory}/framework/shortcodes/team-shortcodes.php file at line number 87 to this –
mo_thumbnail(array('before_html' => '', 'after_html' => '', 'image_size' => 'square', 'image_class' => 'photo_frame', 'wrapper' => false, 'image_alt' => $image_alt, 'size' => 'full'));
I just specified a before_html and after_html attribute value to remove the link. You can also copy this function mo_get_team_content() to your child theme functions.php to override the existing one(makes the change permanent with no upgrade issues).