Replace api.yml to api.fixture.php

- Remove yaml dependency
- Add PHP array based fixture possibility

tests/Util/Database/YamlDataSet.php

@@ -1,50 +0,0 @@
-<?php
-
-namespace Friendica\Test\Util\Database;
-
-use Friendica\Database\Database;
-use Symfony\Component\Yaml\Yaml;
-
-/**
- * Util class to load YAML files into the database
- */
-class YamlDataSet
-{
-	/**
-	 * @var array
-	 */
-	private $tables = [];
-
-	public function __construct(string $yamlFile)
-	{
-		$this->addYamlFile($yamlFile);
-	}
-
-	public function addYamlFile(string $yamlFile)
-	{
-		$data = Yaml::parse(file_get_contents($yamlFile));
-
-		foreach ($data as $tableName => $rows) {
-			if (!isset($rows)) {
-				$rows = [];
-			}
-
-			if (!is_array($rows)) {
-				continue;
-			}
-
-			foreach ($rows as $key => $value) {
-				$this->tables[$tableName][$key] = $value;
-			}
-		}
-	}
-
-	public function load(Database $database)
-	{
-		foreach ($this->tables as $tableName => $rows) {
-			foreach ($rows as $row) {
-				$database->insert($tableName, $row);
-			}
-		}
-	}
-}