Minz request avoid custom methods (#4020)

Take advantage of PHP7+ null-coalescing operator `??` to make code more standard, shorter, and faster instead of custom function with no extra functionality.

Allows code to be better tested and fix two PHPstan errors:

```
 ------ -----------------------------------------
  Line   app/Controllers/configureController.php
 ------ -----------------------------------------
  410    Cannot unset offset 'rid' on string.
 ------ -----------------------------------------

 ------ ------------------------------------
  Line   lib/Minz/FrontController.php
 ------ ------------------------------------
  70     Cannot unset offset 'c' on string.
  71     Cannot unset offset 'a' on string.
 ------ ------------------------------------
```

https://github.com/FreshRSS/FreshRSS/issues/4016

6 files changed, 7 insertions, 7 deletions

diff --git a/app/Controllers/configureController.php b/app/Controllers/configureController.php
index 79ddf8e17..e8d8fb546 100755
--- a/app/Controllers/configureController.php
+++ b/app/Controllers/configureController.php
@@ -152,7 +152,7 @@ class FreshRSS_configure_Controller extends Minz_ActionController {
 		Minz_View::appendScript(Minz_Url::display('/scripts/draggable.js?' . @filemtime(PUBLIC_PATH . '/scripts/draggable.js')));
 
 		if (Minz_Request::isPost()) {
-			$params = Minz_Request::fetchPOST();
+			$params = $_POST;
 			FreshRSS_Context::$user_conf->sharing = $params['share'];
 			FreshRSS_Context::$user_conf->save();
 			invalidateHttpCache();
@@ -406,7 +406,7 @@ class FreshRSS_configure_Controller extends Minz_ActionController {
 		foreach (FreshRSS_Context::$user_conf->queries as $key => $query) {
 			$queries[$key] = new FreshRSS_UserQuery($query, $feed_dao, $category_dao, $tag_dao);
 		}
-		$params = Minz_Request::fetchGET();
+		$params = $_GET;
 		unset($params['rid']);
 		$params['url'] = Minz_Url::display(array('params' => $params));
 		$params['name'] = _t('conf.query.number', count($queries) + 1);
diff --git a/app/Controllers/feedController.php b/app/Controllers/feedController.php
index afb05f17e..c94b3216a 100755
--- a/app/Controllers/feedController.php
+++ b/app/Controllers/feedController.php
@@ -566,7 +566,7 @@ class FreshRSS_feed_Controller extends Minz_ActionController {
 		$url = Minz_Request::param('url');
 		$force = Minz_Request::param('force');
 		$maxFeeds = (int)Minz_Request::param('maxFeeds');
-		$noCommit = Minz_Request::fetchPOST('noCommit', 0) == 1;
+		$noCommit = ($_POST['noCommit'] ?? 0) == 1;
 
 		if ($id == -1 && !$noCommit) {	//Special request only to commit & refresh DB cache
 			$updated_feeds = 0;
diff --git a/app/Models/Auth.php b/app/Models/Auth.php
index 709a80f84..04bd4291f 100644
--- a/app/Models/Auth.php
+++ b/app/Models/Auth.php
@@ -223,7 +223,7 @@ class FreshRSS_Auth {
 	public static function isCsrfOk($token = null) {
 		$csrf = Minz_Session::param('csrf');
 		if ($token === null) {
-			$token = Minz_Request::fetchPOST('_csrf');
+			$token = $_POST['_csrf'] ?? '';
 		}
 		return $token != '' && $token === $csrf;
 	}
diff --git a/app/views/entry/bookmark.phtml b/app/views/entry/bookmark.phtml
index d85706669..e842f7465 100755
--- a/app/views/entry/bookmark.phtml
+++ b/app/views/entry/bookmark.phtml
@@ -4,7 +4,7 @@ header('Content-Type: application/json; charset=UTF-8');
 $url = array(
 	'c' => Minz_Request::controllerName(),
 	'a' => Minz_Request::actionName(),
-	'params' => Minz_Request::fetchGET(),
+	'params' => $_GET,
 );
 
 $url['params']['is_favorite'] = Minz_Request::param('is_favorite', true) ? '0' : '1';
diff --git a/app/views/helpers/logs_pagination.phtml b/app/views/helpers/logs_pagination.phtml
index e74074173..fa69d0b44 100755
--- a/app/views/helpers/logs_pagination.phtml
+++ b/app/views/helpers/logs_pagination.phtml
@@ -1,7 +1,7 @@
 <?php
 	$c = Minz_Request::controllerName();
 	$a = Minz_Request::actionName();
-	$params = Minz_Request::fetchGET();
+	$params = $_GET;
 ?>
 
 <?php if ($this->nbPage > 1) { ?>
diff --git a/app/views/index/global.phtml b/app/views/index/global.phtml
index 4323e3849..5b7e886e8 100644
--- a/app/views/index/global.phtml
+++ b/app/views/index/global.phtml
@@ -11,7 +11,7 @@
 
 <main id="stream" class="global<?= $class ?>">
 <?php
-	$params = Minz_Request::fetchGET();
+	$params = $_GET;
 	unset($params['c']);
 	unset($params['a']);
 	$url_base = array(