framework/RedKiteCms/Content/PageCollection/PermalinkManager.php
public function removeBlock($blockFile)
    {
        foreach ($this->permalinks as $permalink => $associatedBlocks) {
            $tmp = array_flip($associatedBlocks);
            unset($tmp[$blockFile]);
            if (empty($tmp)) {
                unset($this->permalinks[$permalink]);

                continue;
            }

            $this->permalinks[$permalink] = array_flip($tmp);
        }

        return $this;
    }
public function removeBlock($blockFile)
    {
        foreach ($this->permalinks as $permalink => $associatedBlocks) {
            $tmp = array_flip($associatedBlocks);
            unset($tmp[$blockFile]);
            if (empty($tmp)) {
                unset($this->permalinks[$permalink]);

                continue;
            }

            $this->permalinks[$permalink] = array_flip($tmp);
        }

        return $this;
    }
Removes the given block from permalinks list

@param $blockFile

@return $this