remove unused code for vars

src/vars.rs

@@ -33,17 +33,6 @@ impl IStrMap for VarsMap {
     }
 }
 
-impl VarsMap {
-    pub(crate) fn filepath(&self) -> Option<&str> {
-        self.get(&"__file__")
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn encoding(&self) -> Option<&str> {
-        self.get(&"__encoding__")
-    }
-}
-
 impl Deref for VarsMap {
     type Target = BTreeMap<ArcStr, ArcStr>;