[master] RFR: 8307392: [Lilliput] Revert deflation of dead object's monitors [v2]

[Roman Kennke]

> In https://github.com/openjdk/lilliput/pull/28, I introduced some code that forces deflation of monitors on objects that are about to die. Discussions around a possible upstreaming of this code (https://github.com/openjdk/jdk/pull/13721) comes to the conclusion that this should not be necessary, and indeed, I could not reproduce the original problem that I was having in Lilliput with the code removed. I assume some changes in upstream and/or Lilliput since then have fixed the root cause. Let's remove that code and see what explodes.
> 
> Testing: (All with -XX:+UseHeavyMonitors to amplify monitor traffic)
>  - [x] hotspot_gc
>  - [x] tier1
>  - [x] tier2
>  - [x] SPECjvm workloads

Roman Kennke has updated the pull request incrementally with one additional commit since the last revision:

  Cleanup

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

Changes:
  - all: https://git.openjdk.org/lilliput/pull/88/files
  - new: https://git.openjdk.org/lilliput/pull/88/files/f82d25e8..0a3ef027

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=lilliput&pr=88&range=01
 - incr: https://webrevs.openjdk.org/?repo=lilliput&pr=88&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/lilliput/pull/88.diff
  Fetch: git fetch https://git.openjdk.org/lilliput.git pull/88/head:pull/88

PR: https://git.openjdk.org/lilliput/pull/88