diff --git a/crates/desktop/src-tauri/src/ml/weights_registry/weight_descriptor.rs b/crates/desktop/src-tauri/src/ml/weights_registry/weight_descriptor.rs
index 70387cc855..4d4dbfcf4c 100644
--- a/crates/desktop/src-tauri/src/ml/weights_registry/weight_descriptor.rs
+++ b/crates/desktop/src-tauri/src/ml/weights_registry/weight_descriptor.rs
@@ -3,12 +3,6 @@
 //  http::header::name::HeaderName: https://github.com/hyperium/http/blob/master/src/header/name.rs
 //  as a pattern that will support both compile-time constants and dynamically allocated String-based variants.
 
-#[derive(Clone, Copy)]
-pub enum WeightFiletype {
-  Json,
-  SafeTensors,
-}
-
 #[derive(Clone, Copy)]
 pub enum WeightFunction {
   TextEncoder,
@@ -28,8 +22,6 @@ pub struct WeightDescriptor {
   /// eg. https://pub-bc5e2bc0cdee4bb5ae8fca9d641ca0d6.r2.dev/lykon_dreamshaper_7_text_encoder.fp16.safetensors
   pub r2_download_url: &'static str,
 
-  pub filetype: WeightFiletype,
-
   pub function: WeightFunction,
 }
 
diff --git a/crates/desktop/src-tauri/src/ml/weights_registry/weight_descriptor_builder.rs b/crates/desktop/src-tauri/src/ml/weights_registry/weight_descriptor_builder.rs
index 4d70116bf9..5818e7c63b 100644
--- a/crates/desktop/src-tauri/src/ml/weights_registry/weight_descriptor_builder.rs
+++ b/crates/desktop/src-tauri/src/ml/weights_registry/weight_descriptor_builder.rs
@@ -1,38 +1,12 @@
-use crate::ml::weights_registry::weight_descriptor::WeightFiletype;
-pub (super) const BUILDER_ERROR_MESSAGE : &str = "Program will not compile if builder isn't used correctly. Check that all arguments are passed to the builder.";
-
 pub (super) const R2_BUCKET_URL : &str = "https://pub-bc5e2bc0cdee4bb5ae8fca9d641ca0d6.r2.dev/";
 
-pub const fn maybe_filetype(url_or_filename: &'static str) -> Option<WeightFiletype> {
-  const JSON : &[u8] = ".json".as_bytes();
-  const SAFE_TENSORS: &[u8] = ".safetensors".as_bytes();
-  let bytes = url_or_filename.as_bytes();
-
-  // NB: This code is so onerous because there aren't any good string comparison `const fn`s.
-  // Rust will stabilize those eventually: https://github.com/rust-lang/rust/issues/50899
-  if let Some((_first, last)) = bytes.split_last_chunk::<5>() {
-    match last as &[u8] {
-      JSON => return Some(WeightFiletype::Json),
-      _ => {}
-    }
-  }
-  if let Some((_first, last)) = bytes.split_last_chunk::<12>() {
-    match last as &[u8] {
-      SAFE_TENSORS => return Some(WeightFiletype::SafeTensors),
-      _ => {}
-    }
-  }
-  None
-}
-
+// TODO(bt,2025-03-13): Try to use keyword args from the call site.
 macro_rules! weight {
     ($name: literal, $file_name:literal, $weight_function:expr) => {
       $crate::ml::weights_registry::weight_descriptor::WeightDescriptor {
         name: $name,
         filename: $file_name,
         r2_download_url: const_format::concatcp!(crate::ml::weights_registry::weight_descriptor_builder::R2_BUCKET_URL, $file_name),
-        filetype: $crate::ml::weights_registry::weight_descriptor_builder::maybe_filetype($file_name)
-          .expect($crate::ml::weights_registry::weight_descriptor_builder::BUILDER_ERROR_MESSAGE),
         function: $weight_function,
       }
     };