RFR (XS): 8141134: Remove unnecessary pragma warning(disable:4355) from GC code

[Thomas Schatzl]

Hi all,

  Erik H. made me aware of another pragma 4355 in nmethod.cpp that can
be removed.

I updated the webrev in place because of the kind of change.

Thanks,
  Thomas

On Mon, 2015-11-02 at 16:14 +0100, Thomas Schatzl wrote:
> Hi all,
> 
>   can I have reviews for the following change that removes some pragmas
> in GC code?
> With the move to newer MSVC, they are not needed any more.
> 
> CR:
> https://bugs.openjdk.java.net/browse/JDK-8141134
> Webrev:
> http://cr.openjdk.java.net/~tschatzl/8141134/webrev/
> Testing:
> jprt
> 
> Thanks,
>   Thomas
> 
>