[jdk17u-dev] RFR: 8279066: entries.remove(entry) is useless in PKCS12KeyStore

[Goetz Lindenmaier]

I backport this for parity with 17.0.6-oracle.

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Commit messages:
 - Backport fb623f1d2ee858fbc6edfeaaa702b5fcd832a0aa

Changes: https://git.openjdk.org/jdk17u-dev/pull/686/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=686&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8279066
  Stats: 5 lines in 1 file changed: 0 ins; 5 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/686.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/686/head:pull/686

PR: https://git.openjdk.org/jdk17u-dev/pull/686