Remove unused include

Author: the10thWiz

core/lib/src/rocket.rs

@@ -1,4 +1,3 @@
-use std::any::TypeId;
 use std::fmt;
 use std::ops::{Deref, DerefMut};
 use std::sync::Arc;
@@ -514,7 +513,11 @@ impl Rocket<Build> {
     /// If multiple instances of the same type of Fairing have been attached, the modify function
     /// will be run on each instance.
     #[must_use]
-    pub fn modify_fairings<F: Fairing, E: fmt::Debug>(mut self, mut modifier: impl FnMut(&mut F) -> Result<(), E>) -> Result<Self, Self> {
+    pub fn modify_fairings<F, E, Fn>(mut self, mut modifier: Fn) -> Result<Self, Self>
+        where Fn: FnMut(&mut F) -> Result<(), E>,
+              F: Fairing,
+              E: fmt::Debug,
+    {
         #[derive(Debug, PartialEq, Eq)]
         enum State {
             None,