src/Forms/GridFieldDropdownFilter.php
public function removeFilterOption($name)
    {
        $this->filterOptions->remove($this->filterOptions->find('name', $name));
        return $this;
    }
public function removeFilterOption($name)
    {
        $this->filterOptions->remove($this->filterOptions->find('name', $name));
        return $this;
    }
public function removeFilterOption ( $ name ) { $ this -> filterOptions -> remove ( $ this -> filterOptions -> find ( 'name' , $ name ) ) ; return $ this ; }
Remove a filter option with the given name

@param string $name
@return $this
Remove a filter option with the given name