RFR: 8254824: SignalHandlerMark have no purpose

[Coleen Phillimore]

On Thu, 15 Oct 2020 08:46:01 GMT, Robbin Ehn <rehn at openjdk.org> wrote:

> SignalHandlerMark increase and decrease _num_nested_signal, but it is never read.
> We have no caller to is_inside_signal_handler().
> 
> Testing T1.

Marked as reviewed by coleenp (Reviewer).

-------------

PR: https://git.openjdk.java.net/jdk/pull/677