[jdk17u] RFR: 8273807: Zero: Drop incorrect test block from compiler/startup/NumCompilerThreadsCheck.java

[Aleksey Shipilev]

Another Zero testing fix.

Additional testing:
 - [x] Affected test runs Zero properly now

-------------

Commit messages:
 - Backport 1c5de8b86b038f5d5c313c504a8868e36fc80bde

Changes: https://git.openjdk.java.net/jdk17u/pull/132/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u&pr=132&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8273807
  Stats: 5 lines in 1 file changed: 0 ins; 5 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk17u/pull/132.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u pull/132/head:pull/132

PR: https://git.openjdk.java.net/jdk17u/pull/132