Static analysis - avoid unnecessary counts

[norberttech]

It would be nice to have static analysis detect following scenario as invalid:

$array = [];

if (\count($array)) {
   foreach ($array as $element) {
        // some logic
   }
}

Since the array is not nullable foreach would do nothing, so count is unnecessary.

#Ref: https://github.com/flow-php/flow/pull/712#discussion_r1380182613