RFR: 8149019: remove redundant modifiers

[Doug Simon]

I forgot to mention that the webrev for this bug is on top of the RFR for JDK-8148981[1].

-Doug

[1] http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2016-February/021100.html

> On 04 Feb 2016, at 11:08, Doug Simon <doug.simon at oracle.com> wrote:
> 
> JVMCI code is checked by Checkstyle and recent Checkstyle releases have introduced better detection of redundant modifiers. To ensure JVMCI continues to benefit from automated code style checking, it makes sense to keep up with Checkstyle and address style issues detected by newer versions.
> 
> https://bugs.openjdk.java.net/browse/JDK-8149019
> http://cr.openjdk.java.net/~dnsimon/8149019
> 
> -Doug