Simplify API

crates/libsyntax2/src/yellow/green.rs

@@ -43,10 +43,6 @@ pub fn children(&self) -> &[GreenNode] {
         }
     }
 
-    pub fn leaf_text(&self) -> Option<SmolStr> {
-        self.leaf_text_ref().map(Clone::clone)
-    }
-
     pub fn leaf_text_ref(&self) -> Option<&SmolStr> {
         match self {
             GreenNode::Leaf { text, .. } => Some(text),

crates/libsyntax2/src/yellow/syntax.rs

@@ -153,7 +153,7 @@ pub fn is_leaf(&self) -> bool {
     }
 
     pub fn leaf_text(&self) -> Option<SmolStr> {
-        self.red().green().leaf_text()
+        self.borrowed().leaf_text_ref().map(|it| it.clone())
     }
 
     pub(crate) fn replace_with(&self, green: GreenNode) -> GreenNode {