Revert "check requests type validity (#8175)"

This reverts commit 081fdc4.

Author: kamilchodola

src/Nethermind/Nethermind.Core/ExecutionRequest/ExecutionRequestExtensions.cs

@@ -37,9 +37,9 @@ public static int GetRequestsByteSize(this IEnumerable<ExecutionRequest> request
     public static Hash256 CalculateHashFromFlatEncodedRequests(byte[][]? flatEncodedRequests)
     {
         // make sure that length is 3 or less elements
-        if (flatEncodedRequests is null)
+        if (flatEncodedRequests is null || flatEncodedRequests.Length > MaxRequestsCount)
         {
-            throw new ArgumentException("Flat encoded requests must be an array");
+            throw new ArgumentException("Flat encoded requests must be an array of 3 or less elements");
         }
 
         using SHA256 sha256 = SHA256.Create();

src/Nethermind/Nethermind.Merge.Plugin/Data/IExecutionPayloadParams.cs

@@ -1,7 +1,6 @@
 // SPDX-FileCopyrightText: 2023 Demerzel Solutions Limited
 // SPDX-License-Identifier: LGPL-3.0-only
 
-using System;
 using System.Collections.Generic;
 using System.Linq;
 using Nethermind.Core;
@@ -49,6 +48,12 @@ public ValidationResult ValidateParams(IReleaseSpec spec, int version, out strin
                 return ValidationResult.Fail;
             }
 
+            if (ExecutionRequests.Length > ExecutionRequestExtensions.MaxRequestsCount)
+            {
+                error = $"Execution requests must have less than {ExecutionRequestExtensions.MaxRequestsCount} items";
+                return ValidationResult.Fail;
+            }
+
             // verification of the requests
             for (int i = 0; i < ExecutionRequests.Length; i++)
             {