[cleanup] Remove usages of is_luci from all receipes

This is now always True.

Change-Id: I31d5f92839b4cc43e59acb439b1b32e2e63bb727
Reviewed-on: https://dart-review.googlesource.com/c/recipes/+/165240
Auto-Submit: Alexander Thomas <athom@google.com>
Reviewed-by: Karl Klose <karlklose@google.com>
Commit-Queue: Karl Klose <karlklose@google.com>
5 files changed