[Code health] Remove an un-necessary if statement in TouchActionFilter

Bug: None
Change-Id: I0cf1b3155c0fc2e9bfac6396dd45edd8a2d1ca3e
Reviewed-on: https://chromium-review.googlesource.com/c/1494726Reviewed-by: Navid Zolghadr <nzolghadr@chromium.org>
Commit-Queue: Xida Chen <xidachen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#636528}

content/browser/renderer_host/input/touch_action_filter.cc

@@ -172,7 +172,6 @@ FilterGestureEventResult TouchActionFilter::FilterGestureEvent(
       }
 
       gesture_sequence_.append("U");
-      if (!compositor_touch_action_enabled_)
       // Scrolls restricted to a specific axis shouldn't permit movement
       // in the perpendicular axis.
       //