Make $_REQUEST processing independent of sub-calls

- Move HTTPInputData::process() into App::runFrontend()
- Pass $_REQUEST (including processed Input) to every Module method
- Delete $_POST parameters at Module post() calls because of $_REQUEST

src/Module/Api/Mastodon/Statuses/Unfavourite.php

@@ -33,7 +33,7 @@ use Friendica\Module\BaseApi;
  */
 class Unfavourite extends BaseApi
 {
-	protected function post(array $request = [], array $post = [])
+	protected function post(array $request = [])
 	{
 		self::checkAllowedScope(self::SCOPE_WRITE);
 		$uid = self::getCurrentUserID();