Appease Clippy.

src/exploration.rs

@@ -438,20 +438,23 @@ impl<S, A> Default for ExplorationConfig<S, A> {
     }
 }
 
-pub struct ExplorationPlugin<'a, S, A, D>(PhantomData<&'a S>, PhantomData<&'a A>, PhantomData<D>);
+pub struct ExplorationPlugin<'a, S: 'static, A: 'static, D>(
+    PhantomData<&'a S>,
+    PhantomData<&'static A>,
+    PhantomData<D>,
+);
 
-impl<'a, S, A, D> Default for ExplorationPlugin<'a, S, A, D> {
+impl<S, A, D> Default for ExplorationPlugin<'static, S, A, D> {
     fn default() -> Self {
         Self(PhantomData, PhantomData, PhantomData)
     }
 }
 
-impl<'a, S, A, D> Plugin for ExplorationPlugin<'a, S, A, D>
+impl<S, A, D> Plugin for ExplorationPlugin<'static, S, A, D>
 where
     S: Clone + Debug + Eq + Hash + Send + Sync,
     A: Hash + Eq + Clone + Send + Sync,
     D: 'static + Clone + Default + Send + Sync,
-    'a: 'static,
 {
     fn build(&self, app: &mut App) {
         if !app.world.contains_resource::<ExplorationConfig<S, A>>() {

src/navigation.rs

@@ -365,11 +365,10 @@ impl<'a, S, A> Default for NavigationPlugin<'a, S, A> {
     }
 }
 
-impl<'a, S, A> Plugin for NavigationPlugin<'a, S, A>
+impl<S, A> Plugin for NavigationPlugin<'static, S, A>
 where
     S: 'static + Clone + Copy + Debug + Eq + Hash + Send + Sync,
     A: Hash + Eq + Copy + Send + Sync,
-    'a: 'static,
 {
     fn build(&self, app: &mut App) {
         if !app.world.contains_resource::<NavigationConfig<S, A>>() {

src/sound/icon.rs

@@ -287,10 +287,9 @@ impl<'a, S> Default for SoundIconPlugin<'a, S> {
     }
 }
 
-impl<'a, S> Plugin for SoundIconPlugin<'a, S>
+impl<S> Plugin for SoundIconPlugin<'static, S>
 where
     S: 'static + Clone + Debug + Eq + Hash + Send + Sync,
-    'a: 'static,
 {
     fn build(&self, app: &mut App) {
         app.add_system(added)

src/sound/mod.rs

@@ -28,10 +28,9 @@ impl<'a, S> Default for SoundPlugin<'a, S> {
     }
 }
 
-impl<'a, S> Plugin for SoundPlugin<'a, S>
+impl<S> Plugin for SoundPlugin<'static, S>
 where
     S: 'static + Clone + Debug + Eq + Hash + Send + Sync,
-    'a: 'static,
 {
     fn build(&self, app: &mut App) {
         let _core_config = *app.world.get_resource::<CoreConfig>().unwrap();