diff --git a/nac3artiq/src/symbol_resolver.rs b/nac3artiq/src/symbol_resolver.rs
index 36427631..2ce335a7 100644
--- a/nac3artiq/src/symbol_resolver.rs
+++ b/nac3artiq/src/symbol_resolver.rs
@@ -1,7 +1,6 @@
 use inkwell::{types::BasicType, values::BasicValueEnum, AddressSpace};
 use nac3core::{
     codegen::{CodeGenContext, CodeGenerator},
-    location::Location,
     symbol_resolver::{StaticValue, SymbolResolver, SymbolValue, ValueEnum},
     toplevel::{DefinitionId, TopLevelDef},
     typecheck::{
@@ -989,10 +988,6 @@ impl SymbolResolver for Resolver {
         })
     }
 
-    fn get_symbol_location(&self, _: StrRef) -> Option<Location> {
-        unimplemented!()
-    }
-
     fn get_identifier_def(&self, id: StrRef) -> Option<DefinitionId> {
         {
             let id_to_def = self.0.id_to_def.read();
diff --git a/nac3core/src/codegen/test.rs b/nac3core/src/codegen/test.rs
index ea0ccb74..e174f5fc 100644
--- a/nac3core/src/codegen/test.rs
+++ b/nac3core/src/codegen/test.rs
@@ -3,7 +3,6 @@ use crate::{
         concrete_type::ConcreteTypeStore, CodeGenContext, CodeGenTask, DefaultCodeGenerator,
         WithCall, WorkerRegistry,
     },
-    location::Location,
     symbol_resolver::{SymbolResolver, ValueEnum},
     toplevel::{
         composer::TopLevelComposer, DefinitionId, FunInstance, TopLevelContext, TopLevelDef,
@@ -58,10 +57,6 @@ impl SymbolResolver for Resolver {
         unimplemented!()
     }
 
-    fn get_symbol_location(&self, _: StrRef) -> Option<Location> {
-        unimplemented!()
-    }
-
     fn get_identifier_def(&self, id: StrRef) -> Option<DefinitionId> {
         self.id_to_def.read().get(&id).cloned()
     }
diff --git a/nac3core/src/lib.rs b/nac3core/src/lib.rs
index 10e1d257..bff6b5cc 100644
--- a/nac3core/src/lib.rs
+++ b/nac3core/src/lib.rs
@@ -2,7 +2,6 @@
 #![allow(dead_code)]
 
 pub mod codegen;
-pub mod location;
 pub mod symbol_resolver;
 pub mod toplevel;
 pub mod typecheck;
diff --git a/nac3core/src/location.rs b/nac3core/src/location.rs
deleted file mode 100644
index f0968523..00000000
--- a/nac3core/src/location.rs
+++ /dev/null
@@ -1,28 +0,0 @@
-use nac3parser::ast;
-use std::vec::Vec;
-
-#[derive(Clone, Copy, PartialEq)]
-pub struct FileID(u32);
-
-#[derive(Clone, Copy, PartialEq)]
-pub enum Location {
-    CodeRange(FileID, ast::Location),
-    Builtin,
-}
-
-#[derive(Default)]
-pub struct FileRegistry {
-    files: Vec<String>,
-}
-
-impl FileRegistry {
-    pub fn add_file(&mut self, path: &str) -> FileID {
-        let index = self.files.len() as u32;
-        self.files.push(path.to_owned());
-        FileID(index)
-    }
-
-    pub fn query_file(&self, id: FileID) -> &str {
-        &self.files[id.0 as usize]
-    }
-}
diff --git a/nac3core/src/symbol_resolver.rs b/nac3core/src/symbol_resolver.rs
index 8d537bc6..25ad5480 100644
--- a/nac3core/src/symbol_resolver.rs
+++ b/nac3core/src/symbol_resolver.rs
@@ -13,7 +13,7 @@ use crate::{
         typedef::{Type, Unifier},
     },
 };
-use crate::{location::Location, typecheck::typedef::TypeEnum};
+use crate::typecheck::typedef::TypeEnum;
 use inkwell::values::{BasicValueEnum, FloatValue, IntValue, PointerValue};
 use itertools::{chain, izip};
 use nac3parser::ast::{Expr, StrRef};
@@ -113,7 +113,6 @@ pub trait SymbolResolver {
         ctx: &mut CodeGenContext<'ctx, 'a>,
     ) -> Option<ValueEnum<'ctx>>;
 
-    fn get_symbol_location(&self, str: StrRef) -> Option<Location>;
     fn get_default_param_value(&self, expr: &nac3parser::ast::Expr) -> Option<SymbolValue>;
     fn get_string_id(&self, s: &str) -> i32;
     // handle function call etc.
diff --git a/nac3core/src/toplevel/test.rs b/nac3core/src/toplevel/test.rs
index 8021bf96..99a6ed2a 100644
--- a/nac3core/src/toplevel/test.rs
+++ b/nac3core/src/toplevel/test.rs
@@ -1,6 +1,5 @@
 use crate::{
     codegen::CodeGenContext,
-    location::Location,
     symbol_resolver::{SymbolResolver, ValueEnum},
     toplevel::DefinitionId,
     typecheck::{
@@ -62,10 +61,6 @@ impl SymbolResolver for Resolver {
         unimplemented!()
     }
 
-    fn get_symbol_location(&self, _: StrRef) -> Option<Location> {
-        unimplemented!()
-    }
-
     fn get_identifier_def(&self, id: StrRef) -> Option<DefinitionId> {
         self.0.id_to_def.lock().get(&id).cloned()
     }
diff --git a/nac3core/src/typecheck/type_inferencer/test.rs b/nac3core/src/typecheck/type_inferencer/test.rs
index d8156efd..e8459855 100644
--- a/nac3core/src/typecheck/type_inferencer/test.rs
+++ b/nac3core/src/typecheck/type_inferencer/test.rs
@@ -2,7 +2,6 @@ use super::super::typedef::*;
 use super::*;
 use crate::{
     codegen::CodeGenContext,
-    location::Location,
     symbol_resolver::ValueEnum,
     toplevel::{DefinitionId, TopLevelDef},
 };
@@ -41,10 +40,6 @@ impl SymbolResolver for Resolver {
         unimplemented!()
     }
 
-    fn get_symbol_location(&self, _: StrRef) -> Option<Location> {
-        unimplemented!()
-    }
-
     fn get_identifier_def(&self, id: StrRef) -> Option<DefinitionId> {
         self.id_to_def.get(&id).cloned()
     }
diff --git a/nac3standalone/src/basic_symbol_resolver.rs b/nac3standalone/src/basic_symbol_resolver.rs
index 6e886fdf..0b079c80 100644
--- a/nac3standalone/src/basic_symbol_resolver.rs
+++ b/nac3standalone/src/basic_symbol_resolver.rs
@@ -1,6 +1,5 @@
 use nac3core::{
     codegen::CodeGenContext,
-    location::Location,
     symbol_resolver::{SymbolResolver, SymbolValue, ValueEnum},
     toplevel::{DefinitionId, TopLevelDef},
     typecheck::{
@@ -64,10 +63,6 @@ impl SymbolResolver for Resolver {
         unimplemented!()
     }
 
-    fn get_symbol_location(&self, _: StrRef) -> Option<Location> {
-        unimplemented!()
-    }
-
     fn get_identifier_def(&self, id: StrRef) -> Option<DefinitionId> {
         self.0.id_to_def.lock().get(&id).cloned()
     }