Fixing bug #10284

The parameters of modx_sanitize_gpc in protect.inc.php were unfortunately changed in 1.0.10+ and eForm uses this function to sanitize its fields. This breaks eForm, if the form posts array values.
Since GPC arrays are already modified during working modx_sanitize_gpc in in protect.inc.php, sanitize the $fields array in eForm is superfluous in MODX 1.0.10+