I can't Delete Photos Which I Sync from mac?

So i put photos from my old mobi to my mac and then when i put those photos on my iphone i deleted them from my mac. Now when i want to delete those photos i can't. People have suggested using the unticking option in itunes but that desnt work.

Huh? In iTunes? That is not related to Photo Streaming.
System Preferences > iCloud. Deselect Photo Streaming.