RFR: 8348348: Remove unnecessary #ifdef STATIC_BUILD around DEF_STATIC_JNI_OnLoad from zip_util.c

[Jiangli Zhou]

Please review this trivial cleanup that removes the #ifdef STATIC_BUILD around DEF_STATIC_JNI_OnLoad from zip_util.c. Thanks.

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Commit messages:
 - 8348348: Remove unnecessary #ifdef STATIC_BUILD around DEF_STATIC_JNI_OnLoad from zip_util.c

Changes: https://git.openjdk.org/jdk/pull/23247/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23247&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8348348
  Stats: 3 lines in 1 file changed: 0 ins; 2 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/23247.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23247/head:pull/23247

PR: https://git.openjdk.org/jdk/pull/23247