RFR: 8283727: P11KeyGenerator has import statement with two semicolons after JDK-8267319

[Christoph Langer]

Remove double semicolon

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Commit messages:
 - JDK-8283727

Changes: https://git.openjdk.java.net/jdk/pull/7976/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7976&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8283727
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7976.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7976/head:pull/7976

PR: https://git.openjdk.java.net/jdk/pull/7976