diff --git a/crates/bevy_plugin/tests/test_asset_provider.rs b/crates/bevy_plugin/tests/test_asset_provider.rs
index 023baf68..3bd4f6b7 100644
--- a/crates/bevy_plugin/tests/test_asset_provider.rs
+++ b/crates/bevy_plugin/tests/test_asset_provider.rs
@@ -3,7 +3,6 @@ use anyhow::{bail, Result};
 use bevy::prelude::*;
 use bevy::utils::Instant;
 use bevy_yarnspinner::prelude::*;
-use bevy_yarnspinner::UnderlyingYarnLine;
 use utils::prelude::*;
 
 mod utils;
@@ -198,22 +197,3 @@ fn does_not_load_asset_with_invalid_type() -> Result<()> {
     assert!(asset.is_none());
     Ok(())
 }
-
-trait AssetProviderExt {
-    fn get_assets_for_id(&self, id: &str) -> LineAssets;
-}
-
-impl<T> AssetProviderExt for T
-where
-    T: AssetProvider + ?Sized,
-{
-    fn get_assets_for_id(&self, id: &str) -> LineAssets {
-        let line_id = LineId(id.to_owned());
-        let yarn_line = UnderlyingYarnLine {
-            id: line_id,
-            text: String::new(),
-            attributes: vec![],
-        };
-        T::get_assets(self, &yarn_line)
-    }
-}
diff --git a/crates/compiler/src/compiler/antlr_rust_ext.rs b/crates/compiler/src/compiler/antlr_rust_ext.rs
index 08beae0a..d50abc73 100644
--- a/crates/compiler/src/compiler/antlr_rust_ext.rs
+++ b/crates/compiler/src/compiler/antlr_rust_ext.rs
@@ -1,15 +1,11 @@
 //! Contains functionality provided in the C# implementation of ANTLR but not (yet?) in antlr4rust.
 
-use crate::parser::generated::yarnspinnerparser::YarnSpinnerParserContextType;
 use crate::parser::ActualTokenStream;
 use crate::prelude::generated::yarnspinnerparser::YarnSpinnerParserContext;
-use crate::prelude::ContextRefExt;
 use antlr_rust::int_stream::IntStream;
-use antlr_rust::rule_context::RuleContext;
 use antlr_rust::token::{CommonToken, Token, TOKEN_DEFAULT_CHANNEL};
 use antlr_rust::token_factory::{CommonTokenFactory, TokenFactory};
 use antlr_rust::token_stream::TokenStream;
-use antlr_rust::tree::ErrorNode;
 use antlr_rust::InputStream;
 use better_any::TidExt;
 use std::rc::Rc;
@@ -209,17 +205,6 @@ pub(crate) trait YarnSpinnerParserContextExt<'input>:
             .filter_map(|child| child.downcast_rc::<T>().ok())
             .nth(pos)
     }
-
-    /// Adapted from <https://github.com/antlr/antlr4/blob/8dcc6526cfb154d688497f31cf1e0904801c6df2/runtime/CSharp/src/ParserRuleContext.cs#L220>
-    fn add_error_node(
-        &self,
-        bad_token: CommonToken<'input>,
-    ) -> Rc<ErrorNode<'input, YarnSpinnerParserContextType>> {
-        let error_node = Rc::new(ErrorNode::new(Box::new(bad_token)));
-        error_node.set_parent(&Some(self.ref_to_rc()));
-        self.add_child(error_node.clone());
-        error_node
-    }
 }
 impl<'input, T: YarnSpinnerParserContext<'input> + ?Sized> YarnSpinnerParserContextExt<'input>
     for T