Summary

Obsolete RTM flags and remove corresponding code and tests in HotSpot VM.

Problem

RTM flags were deprecated in JDK 23: JDK-8328986

Solution

Obsolete RTM flags in JDK 24 and expire them in JDK 25.

Specification

-  /* Use Restricted Transactional Memory for lock eliding */                \
-  product(bool, UseRTMLocking, false,                                       \
-          "(Deprecated) Enable RTM lock eliding for inflated locks "        \
-          "in compiled code")                                               \
-                                                                            \
-  product(bool, UseRTMDeopt, false,                                         \
-          "(Deprecated) Perform deopt and recompilation based on "          \
-          "RTM abort ratio")                                                \
-                                                                            \
-  product(int, RTMRetryCount, 5,                                            \
-          "(Deprecated) Number of RTM retries on lock abort or busy")       \
-          range(0, max_jint)                                                \
-                                                                            \

Full PR for reference: https://github.com/openjdk/jdk/pull/19589