RFR(XS): 8187280: Remove unused methods from StubQueue

[Volker Simonis]

Hi,

can I please get a review and a sponsor for the following trivial change:

http://cr.openjdk.java.net/~simonis/webrevs/2017/8187280/
https://bugs.openjdk.java.net/browse/JDK-8187280


While working on "8166317: InterpreterCodeSize should be computed" I
found that several methods on StubQueue are not used any more in the
current code base. As StubQueue's code is "more subtle than it looks"
(see stubs.cpp) I think it helps to at least remove the unused parts
:)

Tested by doing a product/slowdebug build and running the hotspot
regression tests.

Thank you and best regards,
Volker