lib/IniModifierArray.php
public function removeValue($name, $section = 0, $key = null, $removePreviousComment = true)
    {
        foreach ($this->modifiers as $mod) {
            if ($mod instanceof IniModifierInterface) {
                $mod->removeValue($name, $section, $key, $removePreviousComment);
            }
        }
    }
public function removeValue($name, $section = 0, $key = null, $removePreviousComment = true)
    {
        foreach ($this->modifiers as $mod) {
            if ($mod instanceof IniModifierInterface) {
                $mod->removeValue($name, $section, $key, $removePreviousComment);
            }
        }
    }
remove an option from all ini file.

It can remove an entire section if you give an empty value as $name, and a $section name.
(deprecated behavior, see removeSection())

@param string $name                  the name of the option to remove, or null to remove an entire section
@param string $section               the section where to remove the value, or the section to remove
@param int    $key                   for option which is an item of array, the key in the array
@param bool   $removePreviousComment if a comment is before the value, if true, it removes also the comment