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diff --git a/deps/v8/third_party/antlr4/runtime/Cpp/runtime/src/atn/DecisionEventInfo.h b/deps/v8/third_party/antlr4/runtime/Cpp/runtime/src/atn/DecisionEventInfo.h
deleted file mode 100644
index 393fd27665..0000000000
--- a/deps/v8/third_party/antlr4/runtime/Cpp/runtime/src/atn/DecisionEventInfo.h
+++ /dev/null
@@ -1,70 +0,0 @@
-/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
- * Use of this file is governed by the BSD 3-clause license that
- * can be found in the LICENSE.txt file in the project root.
- */
-
-#pragma once
-
-#include "antlr4-common.h"
-
-namespace antlr4 {
-namespace atn {
-
-/// <summary>
-/// This is the base class for gathering detailed information about prediction
-/// events which occur during parsing.
-///
-/// Note that we could record the parser call stack at the time this event
-/// occurred but in the presence of left recursive rules, the stack is kind of
-/// meaningless. It's better to look at the individual configurations for their
-/// individual stacks. Of course that is a <seealso cref="PredictionContext"/>
-/// object not a parse tree node and so it does not have information about the
-/// extent (start...stop) of the various subtrees. Examining the stack tops of
-/// all configurations provide the return states for the rule invocations. From
-/// there you can get the enclosing rule.
-///
-/// @since 4.3
-/// </summary>
-class ANTLR4CPP_PUBLIC DecisionEventInfo {
- public:
-  /// <summary>
-  /// The invoked decision number which this event is related to.
-  /// </summary>
-  /// <seealso cref= ATN#decisionToState </seealso>
-  const size_t decision;
-
-  /// <summary>
-  /// The configuration set containing additional information relevant to the
-  /// prediction state when the current event occurred, or {@code null} if no
-  /// additional information is relevant or available.
-  /// </summary>
-  const ATNConfigSet* configs;
-
-  /// <summary>
-  /// The input token stream which is being parsed.
-  /// </summary>
-  const TokenStream* input;
-
-  /// <summary>
-  /// The token index in the input stream at which the current prediction was
-  /// originally invoked.
-  /// </summary>
-  const size_t startIndex;
-
-  /// <summary>
-  /// The token index in the input stream at which the current event occurred.
-  /// </summary>
-  const size_t stopIndex;
-
-  /// <summary>
-  /// {@code true} if the current event occurred during LL prediction;
-  /// otherwise, {@code false} if the input occurred during SLL prediction.
-  /// </summary>
-  const bool fullCtx;
-
-  DecisionEventInfo(size_t decision, ATNConfigSet* configs, TokenStream* input,
-                    size_t startIndex, size_t stopIndex, bool fullCtx);
-};
-
-}  // namespace atn
-}  // namespace antlr4