RFR: 8295719: Remove unneeded disabled warnings in jdk.sctp

Thu Oct 20 10:35:45 UTC 2022

In `libsctp`, there are a couple of `DISABLED_WARNINGS` that are no longer needed to build successfully. These should be removed.

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Commit messages:
 - 8295719: Remove unneeded disabled warnings in jdk.sctp

Changes: https://git.openjdk.org/jdk/pull/10789/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10789&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8295719
  Stats: 3 lines in 1 file changed: 0 ins; 2 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/10789.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10789/head:pull/10789

PR: https://git.openjdk.org/jdk/pull/10789