Create a function named remove$\_$duplicates$($lst$)$ that takes a list of integers $($lst$)$ as its input and returns a new list with any duplicate integers removed. The returned list should be in the same order as the original list.

Test case:

original$\_$list$=[1,2,3,2,4,1,5,6,7,8,5,9]$

remove$\_$duplicates$($original$\_$list$)$#$[1,2,3,4,5,6,7,8,9]$