Rely entirely on CHaP (#391)

* Bump `index-state`

* Get rid of `source-repository-package`

cabal.project

@@ -8,16 +8,6 @@ package cooked-validators
 package cardano-crypto-praos
   flags: -external-libsodium-vrf
 
-source-repository-package
-  type: git
-  location: https://github.com/input-output-hk/cardano-node-emulator
-  tag: 1e09173b74064bd5990d2d3e48af6510780ea349
-  subdir:
-    cardano-node-emulator
-    plutus-ledger
-    plutus-script-utils
-    freer-extras
-
 -- Everything below this point has been copied from cardano-node-emulator cabal.project
 
 -- Custom repository for cardano haskell packages
@@ -35,8 +25,8 @@ repository cardano-haskell-packages
 
 -- See CONTRIBUTING.adoc for how to update index-state
 index-state:
-  , hackage.haskell.org 2024-01-01T00:00:00Z
-  , cardano-haskell-packages 2024-01-01T00:00:00Z
+  , hackage.haskell.org 2024-04-11T00:00:00Z
+  , cardano-haskell-packages 2024-04-11T00:00:00Z
 
 -- We never, ever, want this.
 write-ghc-environment-files: never