Replace BaseObject class with DI::* calls

src/Module/Profile.php

@@ -133,12 +133,9 @@ class Profile extends BaseModule
 
 		$category = $datequery = $datequery2 = '';
 
-		/** @var DateTimeFormat $dtFormat */
-		$dtFormat = self::getClass(DateTimeFormat::class);
-
 		if ($a->argc > 2) {
 			for ($x = 2; $x < $a->argc; $x ++) {
-				if ($dtFormat->isYearMonth($a->argv[$x])) {
+				if (DI::dtFormat()->isYearMonth($a->argv[$x])) {
 					if ($datequery) {
 						$datequery2 = Strings::escapeHtml($a->argv[$x]);
 					} else {