Remove impl Eq from types that didn't qualify for Eq

src/instance.rs

@@ -37,8 +37,6 @@ impl PartialEq for Instance {
     }
 }
 
-impl Eq for Instance {}
-
 impl std::hash::Hash for Instance {
     fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
         self.urls.hash(state);
@@ -171,8 +169,6 @@ impl PartialEq for ChorusUser {
     }
 }
 
-impl Eq for ChorusUser {}
-
 impl ChorusUser {
     pub fn token(&self) -> String {
         self.token.clone()