[turbofan] Drop obsolete unused JSStrictNotEqual operator.

src/interpreter/interpreter.cc

Index: src/interpreter/interpreter.cc
diff --git a/src/interpreter/interpreter.cc b/src/interpreter/interpreter.cc
index 5db69e4f67a17fd91e50f5ff2eb04de88c33f4dd..2f5910041d3ee860e6ed0f0d6e41b4c54165f599 100644
--- a/src/interpreter/interpreter.cc
+++ b/src/interpreter/interpreter.cc
@@ -1305,8 +1305,7 @@ void Interpreter::DoCompareOpWithFeedback(Token::Value compare_op,
           assembler->Equal(CodeStubAssembler::kNegateResult, lhs, rhs, context);
       break;
     case Token::EQ_STRICT:
-      result = assembler->StrictEqual(CodeStubAssembler::kDontNegateResult, lhs,
-                                      rhs, context);
+      result = assembler->StrictEqual(lhs, rhs, context);
       break;
     case Token::LT:
       result = assembler->RelationalComparison(CodeStubAssembler::kLessThan,