fix: remove typing and return type

Signed-off-by: Anna Larch <anna@nextcloud.com>

Author: miaulalala

lib/public/AppFramework/Db/Entity.php

@@ -215,7 +215,7 @@ protected function markFieldUpdated(string $attribute): void {
 	 * @return string the property name
 	 * @since 7.0.0
 	 */
-	public function columnToProperty(string $columnName): string {
+	public function columnToProperty(string $columnName) {
 		$parts = explode('_', $columnName);
 		$property = '';