fix clippy needless lifetimes (#769)

+ ignore them for bevy where we often want explicitness

src/dynamics/solver/interaction_groups.rs

@@ -18,7 +18,7 @@ pub(crate) trait PairInteraction {
 use crate::dynamics::RigidBodyType;
 
 #[cfg(feature = "parallel")]
-impl<'a> PairInteraction for &'a mut ContactManifold {
+impl PairInteraction for &mut ContactManifold {
     fn body_pair(&self) -> (Option<RigidBodyHandle>, Option<RigidBodyHandle>) {
         (self.data.rigid_body1, self.data.rigid_body2)
     }