By tracking import use types to check whether it is scope uses or the other situations like module-relative uses, we can do more accurate redundant import checking.

fixes #117448

For example unnecessary imports in std::prelude that can be eliminated:

```rust
use std::option::Option::Some;//~ WARNING the item `Some` is imported redundantly
use std::option::Option::None; //~ WARNING the item `None` is imported redundantly
```

1 files changed, 1 insertions, 1 deletions

diff --git a/src/tools/rust-analyzer/crates/ide-db/src/symbol_index.rs b/src/tools/rust-analyzer/crates/ide-db/src/symbol_index.rs
index 92c09089e1f..722161282fe 100644
--- a/src/tools/rust-analyzer/crates/ide-db/src/symbol_index.rs
+++ b/src/tools/rust-analyzer/crates/ide-db/src/symbol_index.rs
@@ -31,7 +31,7 @@ use base_db::{
     salsa::{self, ParallelDatabase},
     SourceDatabaseExt, SourceRootId, Upcast,
 };
-use fst::{self, raw::IndexedValue, Automaton, Streamer};
+use fst::{raw::IndexedValue, Automaton, Streamer};
 use hir::{
     db::HirDatabase,
     import_map::{AssocSearchMode, SearchMode},