Removes the item at the specified index.
Original signature is '- (void)removeItemAtIndex:(NSInteger)index'
Available in Mac OS X v10.0 and later.


- index (NSInteger)
- The zero-based index indicating which item to remove. Specifying 0 removes the item at the top of the menu. The index must be valid and non-negative.

- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)