cabal.project: Remove persistent-document SRP

Use the one from Hackage instead.

Author: erikd

cabal.project

@@ -10,8 +10,8 @@ repository cardano-haskell-packages
     d4a35cd3121aa00d18544bb0ac01c3e1691d618f462c46129271bccf39f7e8ee
 
 index-state:
-  , hackage.haskell.org 2024-06-23T23:01:13Z
-  , cardano-haskell-packages 2024-07-24T14:16:32Z
+  , hackage.haskell.org 2024-09-10T19:44:01Z
+  , cardano-haskell-packages 2024-09-06T13:43:41Z
 
 packages:
   cardano-db
@@ -93,8 +93,3 @@ source-repository-package
     trace-forward
     trace-resources
 
-source-repository-package
-  type: git
-  location: https://github.com/input-output-hk/persistent-documentation
-  tag: 0e95dbb144b02a2e6bf3a8a7531f4ad2f7d64ce5
-  --sha256: 0jylzv9s5rv58m9ny1zna2imqhr4yjgxl3i9rp7rir6xr93c30js