Removes the pointer at the given index from the pointer array.
The following elements are moved down one place. If array has
a non-NULLGDestroyNotify function it is called for the removed
element. If so, the return value from this function will potentially point
to freed memory (depending on the GDestroyNotify implementation).
Removes the pointer at the given index from the pointer array. The following elements are moved down one place. If array has a non-NULL GDestroyNotify function it is called for the removed element. If so, the return value from this function will potentially point to freed memory (depending on the GDestroyNotify implementation).