[iOS][MF] Dismiss passwords to the trailing side

Bug: 908063
Change-Id: I838f89b608682cea4e8c83c7d00271550eef9132
Reviewed-on: https://chromium-review.googlesource.com/c/1349317Reviewed-by: Yi Su <mrsuyi@chromium.org>
Commit-Queue: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#610590}

ios/chrome/browser/ui/autofill/manual_fill/password_coordinator.mm

@@ -131,7 +131,6 @@ animationControllerForDismissedController:(UIViewController*)dismissed {
 
   TableViewAnimator* animator = [[TableViewAnimator alloc] init];
   animator.presenting = NO;
-  animator.direction = TableAnimatorDirectionFromLeading;
   return animator;
 }