remove unused struct Snap in lsif

Author: mu001999

crates/rust-analyzer/src/cli/lsif.rs

@@ -8,7 +8,6 @@ use ide::{
     StaticIndex, StaticIndexedFile, TokenId, TokenStaticData,
 };
 use ide_db::{
-    base_db::salsa::{self, ParallelDatabase},
     line_index::WideEncoding,
     LineIndexDatabase,
 };
@@ -25,14 +24,6 @@ use crate::{
     version::version,
 };
 
-/// Need to wrap Snapshot to provide `Clone` impl for `map_with`
-struct Snap<DB>(DB);
-impl<DB: ParallelDatabase> Clone for Snap<salsa::Snapshot<DB>> {
-    fn clone(&self) -> Snap<salsa::Snapshot<DB>> {
-        Snap(self.0.snapshot())
-    }
-}
-
 struct LsifManager<'a> {
     count: i32,
     token_map: FxHashMap<TokenId, Id>,