RFR: 8324537: Remove superfluous _FILE_OFFSET_BITS=64

Tue Jan 23 15:43:43 UTC 2024

With [JDK-8318696](https://bugs.openjdk.org/browse/JDK-8318696), the explicit addition of -D_FILE_OFFSET_BITS=64 for two hotspot files in JvmOverrideFiles.gmk became unnecessary.

I didn't think of checking this in the original bug...

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Commit messages:
 - 8324537: Remove superfluous _FILE_OFFSET_BITS=64

Changes: https://git.openjdk.org/jdk/pull/17537/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17537&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8324537
  Stats: 3 lines in 1 file changed: 0 ins; 3 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/17537.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17537/head:pull/17537

PR: https://git.openjdk.org/jdk/pull/17537