Revert "rust-lang#11973 associated type is unresolved"

This reverts commit 5d1aff3.

Author: lnicola

crates/hir/src/source_analyzer.rs

@@ -652,13 +652,7 @@ fn resolve_hir_path_(
                 let (ty, remaining) =
                     resolver.resolve_path_in_type_ns(db.upcast(), path.mod_path())?;
                 match remaining {
-                    Some(remaining) if remaining > 1 => {
-                        if remaining + 1 == path.segments().len() {
-                            Some((ty, path.segments().last()))
-                        } else {
-                            None
-                        }
-                    }
+                    Some(remaining) if remaining > 1 => None,
                     _ => Some((ty, path.segments().get(1))),
                 }
             }

crates/ide/src/hover/tests.rs

@@ -3764,49 +3764,6 @@ pub fn gimme() -> theitem::TheItem {
     );
 }
 
-#[test]
-fn test_hover_trait_assoc_typealias() {
-    check(
-        r#"
-        fn main() {}
-
-trait T1 {
-    type Bar;
-    type Baz;
-}
-
-struct Foo;
-
-mod t2 {
-    pub trait T2 {
-        type Bar;
-    }
-}
-
-use t2::T2;
-
-impl T2 for Foo {
-    type Bar = String;
-}
-
-impl T1 for Foo {
-    type Bar = <Foo as t2::T2>::Ba$0r;
-    //                          ^^^ unresolvedReference
-}
-        "#,
-        expect![[r#"
-*Bar*
-
-```rust
-test::t2
-```
-
-```rust
-pub type Bar
-```
-"#]],
-    );
-}
 #[test]
 fn hover_generic_assoc() {
     check(