RFR: 8331862: Remove split relocation info implementation

[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.

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Commit messages:
 - 8331862: Remove split relocation info implementation

Changes: https://git.openjdk.org/jdk/pull/19126/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19126&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8331862
  Stats: 114 lines in 11 files changed: 2 ins; 58 del; 54 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