Remove dead code

crates/ra_syntax/src/ast.rs

@@ -90,7 +90,7 @@ mod support {
         AstChildren::new(parent)
     }
 
-    pub(super) fn token2(parent: &SyntaxNode, kind: SyntaxKind) -> Option<SyntaxToken> {
+    pub(super) fn token(parent: &SyntaxNode, kind: SyntaxKind) -> Option<SyntaxToken> {
         parent.children_with_tokens().filter_map(|it| it.into_token()).find(|it| it.kind() == kind)
     }
 }

crates/ra_syntax/src/ast/extensions.rs

@@ -343,7 +343,7 @@ impl ast::TypeBound {
                 .skip_while(|it| it.kind() != T![const])
                 .find(|it| it.kind() == T![?])
         } else {
-            support::token2(&self.syntax, T![?])
+            support::token(&self.syntax, T![?])
         }
     }
 }

crates/ra_syntax/src/ast/traits.rs

@@ -65,7 +65,7 @@ pub trait TypeBoundsOwner: AstNode {
     }
 
     fn colon_token(&self) -> Option<SyntaxToken> {
-        support::token2(self.syntax(), T![:])
+        support::token(self.syntax(), T![:])
     }
 }