Remove erroneous DCHECK related to expression classifiers

src/parsing/expression-classifier.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_PARSING_EXPRESSION_CLASSIFIER_H
 #define V8_PARSING_EXPRESSION_CLASSIFIER_H
 
 #include "src/messages.h"
 #include "src/parsing/scanner.h"
 #include "src/parsing/token.h"
@@ skipping 445 matching lines @@
     reported_errors_->Add(e, zone_);
     reported_errors_end_++;
   }
 
   // Copies the error at position i of the list of reported errors, so that
   // it becomes the last error reported for this classifier.  Position i
   // could be either after the existing errors of this classifier (i.e.,
   // in an inner classifier) or it could be an existing error (in case a
   // copy is needed).
   V8_INLINE void Copy(int i) {
-    DCHECK_LE(reported_errors_end_, i);
     DCHECK_LT(i, reported_errors_->length());
     if (reported_errors_end_ != i)
       reported_errors_->at(reported_errors_end_) = reported_errors_->at(i);
     reported_errors_end_++;
   }
 
   Zone* zone_;
   ZoneList<typename Traits::Type::Expression>* non_patterns_to_rewrite_;
   ZoneList<Error>* reported_errors_;
   DuplicateFinder* duplicate_finder_;
@@ skipping 18 matching lines @@
 };
 
 
 #undef ERROR_CODES
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_EXPRESSION_CLASSIFIER_H