RFR: 8331862: Remove split relocation info implementation [v2]

[Vladimir Kozlov]

> [Split relocation info](https://github.com/openjdk/jdk/blob/master/src/hotspot/share/code/relocInfo.hpp#L225) was used only for SPARC. Non of current OpenJDK platforms use it.
> 
> Tested tier1-3,stress,xcomp.

Vladimir Kozlov has updated the pull request incrementally with one additional commit since the last revision:

  clean up comments

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/19126/files
  - new: https://git.openjdk.org/jdk/pull/19126/files/a9fc1df8..64c9e66b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19126&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19126&range=00-01

  Stats: 13 lines in 1 file changed: 0 ins; 6 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/19126.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19126/head:pull/19126

PR: https://git.openjdk.org/jdk/pull/19126