Revert "Fixup pRequestInfo after GCs (#50447)"

This reverts commit bc60047.

Author: wtgodbe

src/Shared/HttpSys/RequestProcessing/NativeRequestContext.cs

@@ -553,12 +553,9 @@ private IReadOnlyDictionary<int, ReadOnlyMemory<byte>> GetRequestInfo(IntPtr bas
 
  var info = new Dictionary<int, ReadOnlyMemory<byte>>(count);
 
- long fixup = (byte*)nativeRequest - (byte*)baseAddress;
- var pRequestInfo = (HttpApiTypes.HTTP_REQUEST_INFO*)((byte*)nativeRequest->pRequestInfo + fixup);
-
  for (var i = 0; i < count; i++)
  {
- var requestInfo = pRequestInfo[i];
+ var requestInfo = nativeRequest->pRequestInfo[i];
  var offset = (long)requestInfo.pInfo - (long)baseAddress;
  info.Add(
  (int)requestInfo.InfoType,