diff --git a/src/27954.rs b/src/27954.rs
deleted file mode 100644
index 53c4310d..00000000
--- a/src/27954.rs
+++ /dev/null
@@ -1,30 +0,0 @@
-use std::marker::PhantomData;
-
-pub trait Filterable {
-    type Filter;
-}
-
-pub trait ComponentMapper {
-    type Component;
-    fn entities_filtered(&self, <Self::Component as Filterable>::Filter)
-        where Self::Component: Filterable;
-}
-
-pub struct VecMapper<T> {
-    _marker: ::std::marker::PhantomData<T>
-}
-
-impl<T> VecMapper<T> {
-    pub fn new() -> VecMapper<T> {
-        VecMapper { _marker: PhantomData }
-    }
-}
-
-impl<T> ComponentMapper for VecMapper<T> {
-    type Component = T;
-    fn entities_filtered(&self, _filter: T::Filter) where T: Filterable {}
-}
-
-fn main() { 
-    let _m: &ComponentMapper<Component=()> = &VecMapper::<()>::new();
-}