Remove unused include. BUG=b:251196347 TEST=Builds Change-Id: I6776b0fdd905749376ee2b17a634b7dde877e373 Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/gestures/+/3936622 Reviewed-by: Harry Cutts <hcutts@chromium.org> Auto-Submit: Ben Murdoch <benm@chromium.org> Tested-by: Ben Murdoch <benm@chromium.org> Commit-Queue: Ben Murdoch <benm@chromium.org>