RFR: 8266497: Remove unnecessary EMCP liveness indication

[Serguei Spitsyn]

On Tue, 4 May 2021 12:31:46 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

> Marking running_emcp for Method* is unnecessary.  We can set/clear breakpoints in all old emcp methods because they're not deallocated until none are running.  See longer explanation in the CR.
> 
> Tested with tier1-6, tiers 7,8 are running and 98% passing.

Thanks, Coleen! I agree, it is better to file a new bug.

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PR: https://git.openjdk.java.net/jdk/pull/3852