RFR: 8265035: Remove unneeded exception check from refill_ic_stubs()

[Patricio Chilano Mateo]

Hi,

Please review this small fix. The HAS_PENDING_EXCEPTION check will always return false since EXCEPTION_MARK will check that there are no pending exceptions upon entering and VMThread::execute() doesn't throw exceptions.
The comment says that we could get a potential async exception, which is true, since the JT will be blocked waiting on VMOperation_lock. However delivering an async exception doesn't set the _pending_exception field, only additional fields (see JavaThread::send_thread_stop() -> set_pending_async_exception()) that will be later check in check_and_handle_async_exceptions() and only then _pending_exception will be set.

Thanks,
Patricio

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Commit messages:
 - v1

Changes: https://git.openjdk.java.net/jdk/pull/3436/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3436&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8265035
  Stats: 7 lines in 1 file changed: 0 ins; 7 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3436.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3436/head:pull/3436

PR: https://git.openjdk.java.net/jdk/pull/3436