RFR: 8333353: Delete extra empty line in CodeBlob.java

[SendaoYan]

Hi all,
  This trivial fix, delete the extra empty line before `getOopMaps` function in `src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/code/CodeBlob.java` file.
  No risk.

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Commit messages:
 - 8333353: Delete extra empty line in CodeBlob.java

Changes: https://git.openjdk.org/jdk/pull/19499/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19499&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8333353
  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/19499.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19499/head:pull/19499

PR: https://git.openjdk.org/jdk/pull/19499