[jdk8u-dev] RFR: 8274864: Remove Amman/Cairo hacks in ZoneInfoFile

[Victor Rudometov]

https://bugs.openjdk.org/browse/JDK-8305967 Remove Amman/Cairo hacks in ZoneInfoFile

Backport-of: [ec199072](https://github.com/openjdk/jdk/commit/ec199072c5867624d66840238cc8828e16ae8da7)  (cherry picked from commit b4caafe16f14983e303b7f1fdf3090e5c513ebd8 from the [openjdk/jdk11u-dev](https://git.openjdk.org/jdk11u-dev) repository.)

This pull request contains a backport of commit [ec199072](https://github.com/openjdk/jdk/commit/ec199072c5867624d66840238cc8828e16ae8da7) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Naoto Sato on 8 Oct 2021 and was reviewed by Iris Clark and Joe Wang.

Backport is clean. Tests in jdk/test/java/util/TimeZone jdk/test/java/time/test jdk/test/sun/util/resources jdk/test/sun/text/resources jdk/test/sun/util/calendar: Test results: passed: 123

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Commit messages:
 - 8274864: Remove Amman/Cairo hacks in ZoneInfoFile

Changes: https://git.openjdk.org/jdk8u-dev/pull/304/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=304&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8274864
  Stats: 29 lines in 1 file changed: 0 ins; 29 del; 0 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/304.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/304/head:pull/304

PR: https://git.openjdk.org/jdk8u-dev/pull/304