Remove times for display timezone

In the dropdown menu in the rotation config form from now on don't
show times in the display timezone in parentheses next to the normal
time (schedule timezone).

Author: jrauh01

application/forms/RotationConfigForm.php

@@ -1371,30 +1371,12 @@ private function getTimeOptions(): array
             $this->scheduleTimezone
         );
 
-        $dtzFormatter = new \IntlDateFormatter(
-            \Locale::getDefault(),
-            \IntlDateFormatter::NONE,
-            \IntlDateFormatter::SHORT,
-            $this->displayTimezone
-        );
-
         $options = [];
         $dt = new DateTime('now', new DateTimeZone($this->scheduleTimezone));
         for ($hour = 0; $hour < 24; $hour++) {
             for ($minute = 0; $minute < 60; $minute += 30) {
                 $dt->setTime($hour, $minute);
-
-                if ($this->displayTimezone !== $this->scheduleTimezone) {
-                    $dtzDt = (clone $dt)->setTimezone(new DateTimeZone($this->displayTimezone));
-
-                    $options[$dt->format('H:i')] = sprintf(
-                        '%s (%s)',
-                        $formatter->format($dt),
-                        $dtzFormatter->format($dtzDt)
-                    );
-                } else {
-                    $options[$dt->format('H:i')] = $formatter->format($dt);
-                }
+                $options[$dt->format('H:i')] = $formatter->format($dt);
             }
         }