fix: Remove constraint concurrent-output < 1.10.19

This was fixed in haskell.nix at e166d754a739f5e41d389c537498ccdc6150be0b

Author: sgillespie

cabal.project

@@ -53,12 +53,6 @@ package cryptonite
 package text
   flags: -simdutf
 
--- concurrent-output is incompatible with our haskell.nix version due to
--- arch(wasm32).
--- TODO[sgillespie]: Upgrade haskell.nix
-constraints:
-  , concurrent-output < 1.10.19
-
 -- ---------------------------------------------------------
 -- Enable tests