Fixed comments.

src/compiler/checker.ts

@@ -10401,8 +10401,6 @@ namespace ts {
         }
 
         function checkStringLiteralExpression(node: StringLiteral): Type {
-            // TODO (drosen): Do we want to apply the same approach to no-sub template literals?
-
             const contextualType = getContextualType(node);
             if (contextualType && contextualTypeIsStringLiteralType(contextualType)) {
                 return getStringLiteralType(node);

src/compiler/types.ts

@@ -701,7 +701,7 @@ namespace ts {
     }
 
     // Note that a StringLiteral AST node is both an Expression and a TypeNode.  The latter is
-    // because string literals can appear in the type annotation of a parameter node.
+    // because string literals can appear in type annotations as well.
     export interface StringLiteral extends LiteralExpression, TypeNode {
         _stringLiteralBrand: any;
     }