Fixing more errors.

src/context/global_settings.rs

@@ -1,5 +1,6 @@
 #[derive(Debug)]
 pub struct GlobalSettings<'s> {
+    #[allow(dead_code)]
     placeholder: Option<&'s str>,
 }
 

src/context/mod.rs

@@ -12,6 +12,7 @@ pub trait ContextMatcher =
     for<'b, 'r, 's> Fn(RefContext<'b, 'r, 's>, OrgSource<'s>) -> Res<OrgSource<'s>, OrgSource<'s>>;
 pub type DynContextMatcher<'c> = dyn ContextMatcher + 'c;
 pub trait Matcher = for<'s> Fn(OrgSource<'s>) -> Res<OrgSource<'s>, OrgSource<'s>>;
+#[allow(dead_code)]
 pub type DynMatcher<'c> = dyn Matcher + 'c;
 
 pub use exiting::ExitClass;