RFR: 8256719: C1 flags that should have expired are still present

[Tobias Hartmann]

[JDK-8235673](https://bugs.openjdk.java.net/browse/JDK-8235673) removed some flags from C1 and made them C2 only. They expired in JDK 16 and should simply be removed.

Thanks,
Tobias

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Commit messages:
 - 8256719: C1 flags that should have expired are still present

Changes: https://git.openjdk.java.net/jdk/pull/1338/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1338&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8256719
  Stats: 10 lines in 1 file changed: 0 ins; 10 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1338.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1338/head:pull/1338

PR: https://git.openjdk.java.net/jdk/pull/1338