Apply suggestions from code review

Co-authored-by: Jan Kotas <jkotas@microsoft.com>

src/coreclr/vm/gchelpers.cpp

@@ -344,9 +344,7 @@ void PublishObjectAndNotify(TObj* &orObject, GC_ALLOC_FLAGS flags)
 
 inline SIZE_T MaxArrayLength()
 {
-    // Impose limits on maximum array length in each dimension to allow efficient
-    // implementation of advanced range check elimination in future. We have to allow
-    // higher limit for array of bytes (or one byte structs) for backward compatibility.
+    // Impose limits on maximum array length to prevent corner case integer overflow bugs
     // Keep in sync with Array.MaxLength in BCL.
     return 0X7FFFFFC7;
 }

src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/ObjectToIdCache.cs

@@ -175,7 +175,10 @@ private static int GetPrime(int min)
             3, 7, 17, 37, 89, 197, 431, 919, 1931, 4049, 8419, 17519, 36353,
             75431, 156437, 324449, 672827, 1395263, 2893249, 5999471,
             11998949, 23997907, 47995853, 95991737, 191983481, 383966977, 767933981, 1535867969,
-            2146435069, Array.MaxLength // Array.MaxLength is not prime, but it is the largest possible array size. There's nowhere to go from here.
+            2146435069, 0x7FFFFFC7
+            // 0x7FFFFFC7 == Array.MaxLength is not prime, but it is the largest possible array size.
+            // There's nowhere to go from here. Using a const rather than the MaxLength property
+            // so that the array contains only const values.
         };
     }
 }

src/libraries/System.Text.Json/src/System/Text/Json/JsonHelpers.cs

@@ -154,11 +154,7 @@ public static bool IsValidNumberHandlingValue(JsonNumberHandling handling) =>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static void ValidateInt32MaxArrayLength(uint length)
         {
-#if BUILDING_INBOX_LIBRARY
-            if (length > Array.MaxLength)
-#else
             if (length > 0X7FEFFFFF) // prior to .NET 6, max array length for sizeof(T) != 1 (size == 1 is larger)
-#endif
             {
                 ThrowHelper.ThrowOutOfMemoryException(length);
             }