Remove hashbrown dependency now that hashmaps/sets are not in the h…

…ot loop anymore

Signed-off-by: Enrico Ghiorzi <[email protected]>

scan_core/Cargo.toml

@@ -13,7 +13,6 @@ log = { workspace = true }
 rand = { version = "0.8.*", features = ["small_rng"] }
 rayon = "1.10.0"
 ordered-float = "4.2.2"
-hashbrown = "0.15.0"
 smallvec = "1.13.2"
 
 [dev-dependencies]

scan_core/src/channel_system/builder.rs

@@ -5,10 +5,8 @@ use super::{
 use crate::channel_system::ChannelSystemDef;
 use crate::grammar::Type;
 use crate::Expression;
-// use ahash::AHashMap as HashMap;
-use hashbrown::HashMap;
 use log::info;
-use std::collections::VecDeque;
+use std::collections::{HashMap, VecDeque};
 use std::sync::Arc;
 
 /// An expression using CS's [`Var`] as variables.

scan_core/src/pmtl.rs

@@ -1,8 +1,8 @@
 mod numset;
 
 use crate::{Atom, Time};
-use hashbrown::HashSet;
 use numset::NumSet;
+use std::collections::HashSet;
 use std::{hash::Hash, sync::Arc};
 
 type DenseTime = (Time, Time);

scan_core/src/program_graph/builder.rs

@@ -7,9 +7,8 @@ use crate::{
     program_graph::ProgramGraphDef,
     Integer,
 };
-// use ahash::{AHashMap as HashMap, AHashSet as HashSet};
-use hashbrown::HashMap;
 use log::info;
+use std::collections::HashMap;
 use std::sync::Arc;
 
 #[derive(Debug, Clone)]