RFR: 8263757: Remove serviceability/sa/ClhsdClasses.java from ZGC problem list

[Chris Plummer]

The test name has a typo (should be ClhsdbClasses - the 'b' is missing). Therefore it was not actually being excluded, and therefore it runs just fine with ZGC. This is expected since it is not a heap related test.

I'd like to push this as a trivial change.

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Commit messages:
 - remove serviceability/sa/ClhsdClasses.java from zgc problemlist

Changes: https://git.openjdk.java.net/jdk/pull/3059/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3059&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8263757
  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3059.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3059/head:pull/3059

PR: https://git.openjdk.java.net/jdk/pull/3059