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

1 files changed, 1 insertions, 1 deletions

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;