diff --git a/Cargo.lock b/Cargo.lock
index 3a2b21ade..63d3944ac 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,24 +2,6 @@
 # It is not intended for manual editing.
 version = 3
 
-[[package]]
-name = "autocfg"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
-
 [[package]]
 name = "eda4eda"
 version = "0.1.0"
-dependencies = [
- "slab",
-]
-
-[[package]]
-name = "slab"
-version = "0.4.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f92a496fb766b417c996b9c5e57daf2f7ad3b0bebe1ccfca4856390e3d3bb67"
-dependencies = [
- "autocfg",
-]
diff --git a/Cargo.toml b/Cargo.toml
index ec6a31246..4c11a14fc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,4 +6,3 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-slab = "0.4.8"
diff --git a/src/builder/arith.rs b/src/builder/arith.rs
deleted file mode 100644
index 47bae5002..000000000
--- a/src/builder/arith.rs
+++ /dev/null
@@ -1,12 +0,0 @@
-use super::ctx::Reference;
-
-enum Opcode {
-  Add,
-  Mul,
-}
-
-pub struct Expr {
-  opcode: Opcode,
-  operands: Vec<Reference>
-}
-
diff --git a/src/builder/context.rs b/src/builder/context.rs
deleted file mode 100644
index 3d36b2b68..000000000
--- a/src/builder/context.rs
+++ /dev/null
@@ -1,75 +0,0 @@
-use slab;
-
-use crate::{Data, Module};
-
-use super::data::Expr;
-
-pub enum Element {
-  Module(Module),
-  Data(Data),
-  Expr(Expr),
-}
-
-impl Element {
-
-  fn set_key(&mut self, key: usize) {
-    match self {
-      Element::Module(module) => { module.key = key; }
-      _ => panic!("Element::set_key: unexpected element type"),
-    }
-  }
-
-}
-
-pub struct Context {
-  slab: slab::Slab<Element>,
-}
-
-pub trait IsElement {
-  fn into_reference(key: usize) -> Reference;
-}
-
-macro_rules! register_element {
-  ($name:ident) => {
-
-    impl Into<Element> for $name {
-      fn into(self) -> Element {
-        Element::$name(self)
-      }
-    }
-    
-    impl IsElement for $name {
-      fn into_reference(key: usize) -> Reference {
-        Reference::Module(key)
-      }
-    }
-
-  };
-}
-
-register_element!(Module);
-register_element!(Data);
-
-
-pub enum Reference {
-  Module(usize),
-  Data(usize),
-  Expr(usize),
-}
-
-impl Context {
-
-  pub fn new() -> Self {
-    Context {
-      slab: slab::Slab::new(),
-    }
-  }
-
-  pub fn insert<T: Into<Element> + IsElement>(&mut self, elem: T) -> Reference {
-    let key = self.slab.insert(elem.into());
-    self.slab.get_mut(key).unwrap().set_key(key);
-    T::into_reference(key)
-  }
-
-}
-
diff --git a/src/builder/data.rs b/src/builder/data.rs
index b724496fd..e4acb6cee 100644
--- a/src/builder/data.rs
+++ b/src/builder/data.rs
@@ -1,23 +1,4 @@
-use crate::Context;
-
-use super::ctx::Reference;
-
 pub struct Data {
-  parent: Option<Reference>,
-  name: String,
   bits: usize,
 }
 
-impl Data {
-
-  pub fn new(ctx: &mut Context, name: &str, bits: usize) -> Reference {
-    let res = Data {
-      parent: None,
-      name: name.to_string(),
-      bits,
-    };
-    ctx.insert(res)
-  }
-
-}
-
diff --git a/src/builder/mod.rs b/src/builder/mod.rs
index 1ba383f1a..31f314761 100644
--- a/src/builder/mod.rs
+++ b/src/builder/mod.rs
@@ -1,5 +1,2 @@
-pub mod data;
-pub mod module;
-pub mod context;
-pub mod arith;
-
+mod data;
+mod module;
diff --git a/src/builder/module.rs b/src/builder/module.rs
index 0563bcf6a..3c25b61b1 100644
--- a/src/builder/module.rs
+++ b/src/builder/module.rs
@@ -1,26 +1,8 @@
-use super::{ctx::{Context, Reference}, data::Data};
+use super::data::Data;
 
-pub struct Module {
-  pub(crate) key: usize,
-  name: String,
+struct Module {
   subscriber: Vec<i32>,
   inputs: Vec<Data>,
   outputs: Vec<Data>,
 }
 
-impl Module {
-
-  pub fn new(ctx: &mut Context, name: &str, inputs: Vec<Data>) -> Reference {
-    let mut res = Module {
-      key: 0,
-      name: name.to_string(),
-      subscriber: Vec::new(),
-      inputs,
-      outputs: Vec::new(),
-    };
-    ctx.insert(res)
-  }
-
-
-}
-
diff --git a/src/lib.rs b/src/lib.rs
index b8485fb28..a67eea88e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,6 +1,2 @@
 pub mod builder;
 
-pub use builder::module::Module;
-pub use builder::data::Data;
-pub use builder::ctx::Context;
-