RFR: 8351595: JVM_FindClassFromCaller: unused var may be removed

[Matias Saavedra Silva]

Trivial change to remove an unused line of code. Verified with tier1-5 tests.

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Commit messages:
 - 8351595: JVM_FindClassFromCaller: unused var may be removed

Changes: https://git.openjdk.org/jdk/pull/27735/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27735&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8351595
  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/27735.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27735/head:pull/27735

PR: https://git.openjdk.org/jdk/pull/27735