RFR: 8259482: jni_Set/GetField_probe are the same as their _nh versions

[Coleen Phillimore]

Remove the _nh versions.  Tested with tier1 and vmTestbase/nsk/jdi,jvmti tests.

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Commit messages:
 - 8259482: jni_Set/GetField_probe are the same as their _nh versions

Changes: https://git.openjdk.java.net/jdk/pull/2008/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2008&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8259482
  Stats: 37 lines in 3 files changed: 0 ins; 33 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2008.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2008/head:pull/2008

PR: https://git.openjdk.java.net/jdk/pull/2008