Cleanup

src/context.rs

@@ -65,11 +65,8 @@ impl Context for ThreadContext {
 /// For example, if you create a `Transform` with a context (calling `new_*_context()`), then it will only support `Profile` with a context as well.
 pub struct ThreadContext {
     handle: ffi::Context,
-    // _user_data: PhantomData<UserData>
 }
 
-// pub type ContextUserData = *mut std::os::raw::c_void;
-
 impl GlobalContext {
     pub fn new() -> Self {
         Self {