Remove deprecated Group::addToGroupByName()

Use $member->addToGroupByCode($groupcode) instead

security/Group.php

@@ -216,15 +216,6 @@ public function fieldLabels($includerelations = true) {
 		return $labels;
 	}
 
-	/**
-	 * @deprecated 2.5
-	 */
-	public static function addToGroupByName($member, $groupcode) {
-		Deprecation::notice('2.5', 'Use $member->addToGroupByCode($groupcode) instead.');
-
-		return $member->addToGroupByCode($groupcode);
-	}
-
 	/**
 	 * Get many-many relation to {@link Member},
 	 * including all members which are "inherited" from children groups of this record.
@@ -323,14 +314,6 @@ public function stageChildren() {
 		);
 	}
 
-	/**
-	 * @deprecated 3.0 Use getTreeTitle()
-	 */
-	public function TreeTitle() {
-		Deprecation::notice('3.0', 'Use getTreeTitle() instead.');
-		return $this->getTreeTitle();
-	}
-
 	public function getTreeTitle() {
 	    if($this->hasMethod('alternateTreeTitle')) return $this->alternateTreeTitle();
 		else return htmlspecialchars($this->Title, ENT_QUOTES);