This reverts commit fb7fc87d237ce569666f7bd041adea6007549138.
I first submitted that as a way to add dynamic capability to the
prometheus rules (they infamously don't support ENV variable
substitution there). However this be done easily with another solution,
and would clean up the prometheus chart values significantly.
Change-Id: Ibec512d92490798ae5522468b915b49e7746806a
cdd0f33d0c