Prune pallas dependencies.

Using 'pallas' as a dependency brings utxo-rpc other annoying dependencies such as _tokyo_. This not only makes the overall build longer, but it also prevents it to even work when targetting wasm.

crates/aiken-lang/src/expr.rs

@@ -15,7 +15,7 @@ use crate::{
     },
 };
 use indexmap::IndexMap;
-use pallas::ledger::primitives::alonzo::{Constr, PlutusData};
+use pallas_primitives::alonzo::{Constr, PlutusData};
 use std::{fmt::Debug, rc::Rc};
 use uplc::{
     ast::Data,

crates/aiken-lang/src/plutus_version.rs

@@ -1,4 +1,4 @@
-use pallas::ledger::primitives::conway::Language;
+use pallas_primitives::conway::Language;
 use serde::{Deserialize, Serialize};
 
 #[derive(Debug, Default, Deserialize, Serialize, Clone, Copy, PartialEq)]