RFR: 8216359: Remove develop flags TraceCompilationPolicy and TimeCompilationPolicy

[Claes Redestad]

Hi,

the develop flags Trace- and TimeCompilationPolicy are not implemented
for any of the current default compilation policy implementations and
should be removed. (They _are_ implemented for StackWalkCompPolicy
which I'm proposing to be deprecated).

(This also removes the declaration of _in_vm_startup that should have
been removed by JDK-8216262)

Webrev: http://cr.openjdk.java.net/~redestad/8216359/open.00/
Bug:    https://bugs.openjdk.java.net/browse/JDK-8216359

Thanks!

/Claes