remove deprecated calls to update button

.travis.yml

@@ -12,9 +12,7 @@ php:
 
 env:
  matrix:
-  - DB=pgsql MOODLE_BRANCH=MOODLE_31_STABLE
   - DB=pgsql MOODLE_BRANCH=master
-  - DB=mysqli MOODLE_BRANCH=MOODLE_31_STABLE
   - DB=mysqli MOODLE_BRANCH=master
 
 before_install:

export.php

@@ -45,7 +45,6 @@ $PAGE->set_url($att->url_export());
 $PAGE->set_title($course->shortname. ": ".$att->name);
 $PAGE->set_heading($course->fullname);
 $PAGE->set_cacheable(true);
-$PAGE->set_button($OUTPUT->update_module_button($cm->id, 'attendance'));
 $PAGE->navbar->add(get_string('export', 'attendance'));
 
 $formparams = array('course' => $course, 'cm' => $cm, 'modcontext' => $context);

report.php

@@ -53,7 +53,6 @@ $PAGE->set_pagelayout('report');
 $PAGE->set_title($course->shortname. ": ".$att->name.' - '.get_string('report', 'attendance'));
 $PAGE->set_heading($course->fullname);
 $PAGE->set_cacheable(true);
-$PAGE->set_button($OUTPUT->update_module_button($cm->id, 'attendance'));
 $PAGE->navbar->add(get_string('report', 'attendance'));
 
 $output = $PAGE->get_renderer('mod_attendance');

take.php

@@ -64,7 +64,6 @@ $PAGE->set_url($att->url_take());
 $PAGE->set_title($course->shortname. ": ".$att->name);
 $PAGE->set_heading($course->fullname);
 $PAGE->set_cacheable(true);
-$PAGE->set_button($OUTPUT->update_module_button($cm->id, 'attendance'));
 $PAGE->navbar->add($att->name);
 
 $output = $PAGE->get_renderer('mod_attendance');

tempmerge.php

@@ -45,7 +45,6 @@ require_login($course, true, $cm);
 $PAGE->set_title($course->shortname.": ".$att->name.' - '.get_string('tempusermerge', 'attendance'));
 $PAGE->set_heading($course->fullname);
 $PAGE->set_cacheable(true);
-$PAGE->set_button($OUTPUT->update_module_button($cm->id, 'attendance'));
 $PAGE->navbar->add(get_string('tempusermerge', 'attendance'));
 
 $formdata = (object)array(