kill utils module

crates/ra_ide_api/src/lib.rs

@@ -38,7 +38,7 @@ mod marks;
 
 use std::sync::Arc;
 
-use ra_syntax::{SourceFile, TreeArc, TextRange, TextUnit};
+use ra_syntax::{SourceFile, TreeArc, TextRange, TextUnit, AstNode};
 use ra_text_edit::TextEdit;
 use ra_db::{
     SourceDatabase, CheckCanceled,
@@ -244,8 +244,7 @@ impl Analysis {
     /// Returns a syntax tree represented as `String`, for debug purposes.
     // FIXME: use a better name here.
     pub fn syntax_tree(&self, file_id: FileId) -> String {
-        let file = self.db.parse(file_id);
-        ra_ide_api_light::syntax_tree(&file)
+        self.db.parse(file_id).syntax().debug_dump()
     }
 
     /// Returns an edit to remove all newlines in the range, cleaning up minor