fix tests

crates/ra_analysis/src/db/mod.rs

@@ -61,21 +61,12 @@ salsa::query_group! {
     }
 }
 
-#[derive(Default, Debug)]
+#[derive(Default, Debug, PartialEq, Eq)]
 pub(crate) struct FileSet {
     pub(crate) files: FxHashSet<FileId>,
     pub(crate) resolver: FileResolverImp,
 }
 
-impl PartialEq for FileSet {
-    fn eq(&self, other: &FileSet) -> bool {
-        self.files == other.files
-    }
-}
-
-impl Eq for FileSet {
-}
-
 impl Hash for FileSet {
     fn hash<H: Hasher>(&self, hasher: &mut H) {
         let mut files = self.files.iter().cloned().collect::<Vec<_>>();