removed global vars declaration for var not used in method.

mod/quiz/report/analysis/report.php

@@ -6,7 +6,7 @@
 class quiz_report extends quiz_default_report {
 
     function display($quiz, $cm, $course) {     /// This function just displays the report
-        global $CFG, $SESSION, $db, $QTYPES;
+        global $CFG, $SESSION, $QTYPES;
         $strnoquiz = get_string('noquiz','quiz');
         $strnoattempts = get_string('noattempts','quiz');
     /// Only print headers if not asked to download data

mod/quiz/report/grading/report.php

@@ -28,7 +28,6 @@ class quiz_report extends quiz_default_report {
      * Displays the report.
      */
     function display($quiz, $cm, $course) {
-        global $CFG, $SESSION, $USER, $db, $QTYPES;
 
         $action = optional_param('action', 'viewquestions', PARAM_ALPHA);
         $questionid = optional_param('questionid', 0, PARAM_INT);

mod/quiz/report/overview/report.php

@@ -16,7 +16,7 @@ class quiz_report extends quiz_default_report {
      * Display the report.
      */
     function display($quiz, $cm, $course) {
-        global $CFG, $SESSION, $db, $QTYPES;
+        global $CFG, $db;
 
         // Define some strings
         $strreallydel  = addslashes(get_string('deleteattemptcheck','quiz'));

mod/quiz/report/regrade/report.php

@@ -6,7 +6,7 @@ require_once($CFG->libdir.'/tablelib.php');
 class quiz_report extends quiz_default_report {
 
     function display($quiz, $cm, $course) {
-        global $CFG, $SESSION, $db, $QTYPES;
+        global $CFG;
 
         // Print header
         $this->print_header_and_tabs($cm, $course, $quiz, $reportmode="regrade");