RFR: 8277797: Remove undefined/unused SharedRuntime::trampoline_size()

[Thomas Stuefe]

On Wed, 24 Nov 2021 15:54:47 GMT, Zhengyu Gu <zgu at openjdk.org> wrote:

> A trivial patch to remove undefined and unused `SharedRuntime::trampoline_size()`, a leftover from [JDK-8263002](https://bugs.openjdk.java.net/browse/JDK-8263002).

LGTM

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

Marked as reviewed by stuefe (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/6540