removed deprecation note from gather documentation
removed deprecation note from gather documentation

bfurtaw/thrust,hemmingway/thrust,google-code-export/thrust,bfurtaw/thrust,allendaicool/thrust,malenie/thrust,levendlee/thrust,lishi0927/thrust,Vishwa07/thrust,h1arshad/thrust,Vishwa07/thrust,allendaicool/thrust,google-code-export/thrust,h1arshad/thrust,levendlee/thrust,h1arshad/thrust,rdmenezes/thrust,Vishwa07/thrust,malenie/thrust,bfurtaw/thrust,levendlee/thrust,google-code-export/thrust,bfurtaw/thrust,julianromera/thrust,UIKit0/thrust,julianromera/thrust,Vishwa07/thrust,hemmingway/thrust,malenie/thrust,h1arshad/thrust,lishi0927/thrust,hemmingway/thrust,julianromera/thrust,lishi0927/thrust,allendaicool/thrust,allendaicool/thrust,julianromera/thrust,hemmingway/thrust,levendlee/thrust,malenie/thrust,rdmenezes/thrust,rdmenezes/thrust,UIKit0/thrust,lishi0927/thrust,rdmenezes/thrust,UIKit0/thrust,UIKit0/thrust,google-code-export/thrust