[DeadCode] Empty array checker before foreach

[TomasVotruba]

If values is always array, the check before foreach is useless

cc @afilina Just saw it in my code... Is that what you had in mind?
https://twitter.com/afilina/status/1242173453429608448

[afilina]

Yes, precisely.

[alexanderschnitzler]

Does this rector cover these cases as well or should I open issues for it?

if (!empty($array)) {
    foreach($array as $value){}
}

and

if (count($array) > 0) {
    foreach($array as $value){}
}

[TomasVotruba]

Send PR with test fixture. Also beware of null iteration