[jdk8u-dev] RFR: 8323202: [8u] Remove get_source.sh and hgforest.sh

[Zdenek Zambersky]

Remove get_source.sh and hgforest.sh scripts. These scripts were used with mercurial forest and are no longer useful after switching to git.

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Commit messages:
 - Removed get_source.sh and hgforest.sh

Changes: https://git.openjdk.org/jdk8u-dev/pull/417/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=417&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8323202
  Stats: 244 lines in 2 files changed: 0 ins; 244 del; 0 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/417.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/417/head:pull/417

PR: https://git.openjdk.org/jdk8u-dev/pull/417