Remove inheritdoc from one property

[gewarren]

This is a test related to #11282. After merging, I'll generate the IntelliSense file and see if the UIDs in the MaxValue docs resolve.

[gewarren]

This worked. New output from CI pipeline:

<member name="P:System.IntPtr.MaxValue">
      <summary>Gets the largest possible value of <see cref="T:System.IntPtr" />.</summary>
      <returns>The largest possible value of <see cref="T:System.IntPtr" />.</returns>
    </member>
...

[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/area-system-runtime