remove_focus_sibling

Description:

public void remove_focus_sibling (CellRenderer renderer, CellRenderer sibling)

Removes sibling from renderer’s focus sibling list (see add_focus_sibling).

this	a `GtkCellArea`
renderer	the `GtkCellRenderer` expected to have focus
sibling	the `GtkCellRenderer` to remove from `renderer`’s focus area