chore: remove the stray .agiloft-spec working notes (#6605)

Transcribed Agiloft REST docs committed by accident in #6562 alongside the
alrest repointing. Nothing imports or links it, it sits in a dot-directory at
the repo root rather than anywhere docs live, and the integration it informed
has shipped. Contents are the vendor's own public examples — placeholder
credentials and localhost hosts only, so nothing sensitive was exposed while
it was public.

Author: waleedlatif1