RFR JDK-8180853: Remove bitrotted Windows IA64 code in src/share/vm/oops/oop.inline.hpp

[George Triantafillou]

Please review this small fix to remove bitrotted Windows IA64 code:

JBS: https://bugs.openjdk.java.net/browse/JDK-8180853
webrev: http://cr.openjdk.java.net/~gtriantafill/8180853-webrev/webrev/ 
<http://cr.openjdk.java.net/%7Egtriantafill/8180853-webrev/webrev/>

Built and tested on Windows x64.

Thanks.

-George