Simplify environment checks

- Remove Old Arm environment check prior to moving to Linaro
- In migration and in Linaro OpenCI, environment difference
  is only in staging or production site.

Change-Id: Ib2c1bf786b67f354caeb5b3668649c922835cd0f
Signed-off-by: Saheer Babu <saheer.babu@arm.com>
1 file changed