Remove unnecessary List creation

pkg/analyzer/lib/src/generated/parser.dart

Index: pkg/analyzer/lib/src/generated/parser.dart
diff --git a/pkg/analyzer/lib/src/generated/parser.dart b/pkg/analyzer/lib/src/generated/parser.dart
index 94ad0ccfdd884228cf7d4a3db9f2548ddce166ac..5d1432315373d7562af6e550fcb85ef0ffa54f6e 100644
--- a/pkg/analyzer/lib/src/generated/parser.dart
+++ b/pkg/analyzer/lib/src/generated/parser.dart
@@ -4598,9 +4598,8 @@ class Parser {
     if (commentTokens.isEmpty) {
       return null;
     }
-    List<Token> tokens = new List.from(commentTokens);
-    List<CommentReference> references = _parseCommentReferences(tokens);
-    return Comment.createDocumentationCommentWithReferences(tokens, references);
+    List<CommentReference> references = _parseCommentReferences(commentTokens);
+    return Comment.createDocumentationCommentWithReferences(commentTokens, references);
   }
 
   /**
@@ -6442,7 +6441,7 @@ class Parser {
       _reportErrorForCurrentToken(ParserErrorCode.MISSING_IDENTIFIER, []);
       components.add(_createSyntheticToken(TokenType.IDENTIFIER));
     }
-    return new SymbolLiteral(poundSign, new List.from(components));
+    return new SymbolLiteral(poundSign, components);
   }
 
   /**