refactor(mnn): remove unused model loading methods from mnn.rs files

src/facedet/retinaface/mnn.rs

@@ -61,35 +61,6 @@ impl FaceDetection {
     ) -> std::result::Result<FaceDetectionBuilder, error_stack::Report<crate::errors::Error>> {
         FaceDetectionBuilder::new(model)
     }
-
-    pub fn new(path: impl AsRef<Path>) -> Result<Self> {
-        let model = std::fs::read(path)
-            .change_context(Error)
-            .attach_printable("Failed to read model file")?;
-        Self::new_from_bytes(&model)
-    }
-
-    pub fn new_from_bytes(model: &[u8]) -> Result<Self> {
-        tracing::info!("Loading face detection model from bytes");
-        let mut model = mnn::Interpreter::from_bytes(model)
-            .map_err(|e| e.into_inner())
-            .change_context(Error)
-            .attach_printable("Failed to load model from bytes")?;
-        model.set_session_mode(mnn::SessionMode::Release);
-        model
-            .set_cache_file("retinaface.cache", 128)
-            .change_context(Error)
-            .attach_printable("Failed to set cache file")?;
-        let bc = mnn::BackendConfig::default().with_memory_mode(mnn::MemoryMode::High);
-        let sc = mnn::ScheduleConfig::new()
-            .with_type(mnn::ForwardType::Metal)
-            .with_backend_config(bc);
-        tracing::info!("Creating session handle for face detection model");
-        let handle = mnn_sync::SessionHandle::new(model, sc)
-            .change_context(Error)
-            .attach_printable("Failed to create session handle")?;
-        Ok(FaceDetection { handle })
-    }
 }
 
 impl FaceDetector for FaceDetection {