system_api: Remove permission_broker RequestPathAccess method

This method has been removed from the permission_broker's DBus API.

BUG=chromium:863566
TEST=cros_workon_make system_api --test

Change-Id: I4005a605006eb29597e9b065e7848e0fdeeadb85
Reviewed-on: https://chromium-review.googlesource.com/1137057
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Reilly Grant <reillyg@chromium.org>
Reviewed-by: Dan Erat <derat@chromium.org>
1 file changed