A personal handwritten letter that Jennifer Aniston gave her late 'Friends' co-star Matthew Perry, has reportedly been withdrawn from an upcoming charity auction.The note, believed to have been written around the wrap of their hit series 'Friends', was initially among the actor's belongings, set to be auctioned off to raise funds for his charity. The letter, believed to have been given to the star after the wrap of the 10 seasons of 'Friends' in 2004, has officially been withdrawn, Heritage Auctions confirmed to The Independent.The handwritten note, offered a rare glimpse into Aniston and Perry's off-screen friendship and even seemed to allude to the actor's struggles with drug addiction.