Revert "[ty] Fix completion in decorator without class or function definition" (#22176)

crates/ruff_python_parser/src/parser/statement.rs

@@ -2914,27 +2914,21 @@ impl<'src> Parser<'src> {
                     self.current_token_range(),
                 );
 
-                let range = self.node_range(start);
-
-                ast::StmtFunctionDef {
-                    node_index: Default::default(),
-                    range,
-                    is_async: false,
-                    decorator_list: decorators,
-                    name: ast::Identifier {
-                        id: Name::empty(),
-                        range: self.missing_node_range(),
-                        node_index: AtomicNodeIndex::NONE,
-                    },
-                    type_params: None,
-                    parameters: Box::new(ast::Parameters {
-                        range: self.missing_node_range(),
-                        ..ast::Parameters::default()
-                    }),
-                    returns: None,
-                    body: vec![],
-                }
-                .into()
+                // TODO(dhruvmanila): It seems that this recovery drops all the parsed
+                // decorators. Maybe we could convert them into statement expression
+                // with a flag indicating that this expression is part of a decorator.
+                // It's only possible to keep them if it's a function or class definition.
+                // We could possibly keep them if there's indentation error:
+                //
+                // ```python
+                // @decorator
+                //   @decorator
+                // def foo(): ...
+                // ```
+                //
+                // Or, parse it as a binary expression where the left side is missing.
+                // We would need to convert each decorator into a binary expression.
+                self.parse_statement()
             }
         }
     }