MDL-12856 - previous commit was breaking moodle installs after

redeclaring method. Remove the duplicate function.

merged from MOODLE_19_STABLE

enrol/paypal/enrol.php

@@ -125,16 +125,6 @@ function get_access_icons($course) {
     return $str;
 }
 
-/**
- * This is needed, solely because we use the 'manual' plug-in to display course key.
- */
-function print_enrolmentkeyfrom($course) {
-    global $CFG;
-
-    require_once($CFG->dirroot.'/enrol/manual/enrol.php');
-    return enrolment_plugin_manual::print_enrolmentkeyfrom($course);
-}
-
 /// Override the base class config_form() function
 function config_form($frm) {
     global $CFG;