RFR: Revert "7903198: Refine filtering for enums"

Tue Jul 5 11:12:22 UTC 2022

This reverts commit 5e51e03329e11c0db977f58d698e1f8cc42b2463.

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Commit messages:
 - Revert "7903198: Refine filtering for enums"

Changes: https://git.openjdk.org/jextract/pull/51/files
 Webrev: https://webrevs.openjdk.org/?repo=jextract&pr=51&range=00
  Stats: 47 lines in 6 files changed: 5 ins; 24 del; 18 mod
  Patch: https://git.openjdk.org/jextract/pull/51.diff
  Fetch: git fetch https://git.openjdk.org/jextract pull/51/head:pull/51

PR: https://git.openjdk.org/jextract/pull/51