Remove the chain spec

This is causing problems, and we're going to be removing all of the specs anyway...

Author: nc6

stack.yaml

@@ -5,7 +5,6 @@ packages:
   - test
   - specs/ledger/hs
   - specs/semantics/hs
-  - specs/chain/hs
 
 extra-deps:
   - git: https://github.com/input-output-hk/cardano-prelude