Drop no-project test

Eventually, we should support "just open random rust file" use case,
we don't really do this now, so let's avoid spending time on it until
we fix it properly.

crates/rust-analyzer/tests/heavy_tests/main.rs

@@ -58,55 +58,6 @@ fn completes_items_from_standard_library() {
     eprintln!("completion took {:?}", completion_start.elapsed());
 }
 
-#[test]
-fn test_runnables_no_project() {
-    if skip_slow_tests() {
-        return;
-    }
-
-    let server = project(
-        r"
-//- lib.rs
-#[test]
-fn foo() {
-}
-",
-    );
-    server.wait_until_workspace_is_loaded();
-    server.request::<Runnables>(
-        RunnablesParams { text_document: server.doc_id("lib.rs"), position: None },
-        json!([
-            {
-              "args": {
-                "cargoArgs": ["test"],
-                "executableArgs": ["foo", "--nocapture"],
-              },
-              "kind": "cargo",
-              "label": "test foo",
-              "location": {
-                "targetRange": {
-                  "end": { "character": 1, "line": 2 },
-                  "start": { "character": 0, "line": 0 }
-                },
-                "targetSelectionRange": {
-                  "end": { "character": 6, "line": 1 },
-                  "start": { "character": 3, "line": 1 }
-                },
-                "targetUri": "file:///[..]/lib.rs"
-              }
-            },
-            {
-              "args": {
-                "cargoArgs": ["check", "--workspace"],
-                "executableArgs": [],
-              },
-              "kind": "cargo",
-              "label": "cargo check --workspace"
-            }
-        ]),
-    );
-}
-
 #[test]
 fn test_runnables_project() {
     if skip_slow_tests() {