cabal.project: remove now-unnecessary workarounds

Author: amesgen

cabal.project

@@ -1,20 +1,11 @@
 packages: . hs2048
 
-index-state: 2025-04-03T07:26:54Z
-
-allow-newer:
-  all:base
+index-state: 2025-06-09T18:18:27Z
 
 if arch(wasm32)
   -- Required for TemplateHaskell. When using wasm32-wasi-cabal from
   -- ghc-wasm-meta, this is superseded by the global cabal.config.
   shared: True
 
-  -- https://github.com/haskellari/splitmix/pull/73
-  source-repository-package
-    type: git
-    location: https://github.com/amesgen/splitmix
-    tag: cea9e31bdd849eb0c17611bb99e33d590e126164
-
 package aeson
   flags: -ordered-keymap