RFR: 8253349: Remove unimplemented SharedRuntime::native_method_throw_unsupported_operation_exception_entry

[Aleksey Shipilev]

The definition was removed in JDK-7196277 (confidential):
https://github.com/openjdk/jdk/commit/149097fbb751155cba49de38f8da5b39635198af

Declaration was left behind.

Testing:
  - [x] Linux x86_64 fastdebug build
  - [x] Text search for `native_method_throw_unsupported_operation_exception_entry` in `src/hotspot`

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Commit messages:
 - 8253349: Remove unimplemented SharedRuntime::native_method_throw_unsupported_operation_exception_entry

Changes: https://git.openjdk.java.net/jdk/pull/244/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=244&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8253349
  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/244.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/244/head:pull/244

PR: https://git.openjdk.java.net/jdk/pull/244