RFR: 8284198: Undo JDK-8261137: Optimization of Box nodes in uncommon_trap [v2]

[Wu Yan]

> [JDK-8261137](https://bugs.openjdk.java.net/browse/JDK-8261137) introduced a regression and has been disabled by [JDK-8276112](https://bugs.openjdk.java.net/browse/JDK-8276112).
> 
> This revert the changes of [JDK-8261137](https://bugs.openjdk.java.net/browse/JDK-8261137) and [JDK-8264940](https://bugs.openjdk.java.net/browse/JDK-8264940), the tests added by [JDK-8261137](https://bugs.openjdk.java.net/browse/JDK-8261137) seems to prevent possible future bugs, so I kept it.

Wu Yan has updated the pull request incrementally with one additional commit since the last revision:

  delete related tests

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8083/files
  - new: https://git.openjdk.java.net/jdk/pull/8083/files/57c72d55..ddfb7872

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8083&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8083&range=00-01

  Stats: 192 lines in 2 files changed: 0 ins; 192 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8083.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8083/head:pull/8083

PR: https://git.openjdk.java.net/jdk/pull/8083