Remove version generation approach.

Remove version generation approach.

Revert "Partially reland Auto-generate v8 version based on tags."

This reverts commit 0707afc863e14ad216fa2157f41fc35f86bd64b2.

Revert "Ensure tags are fetched when generating the V8 version."

This reverts commit ea6831e9de62ceade14b7baeb7d57c74a30a1f38.

Revert "Restrict tag-update for version generation to cached git repos."

This reverts commit c6641e138bb4a81b47f70e62bb9113c87b590a6f.

BUG=chromium:446166
LOG=n

Committed: https://crrev.com/5577dbdcf13c2f6091c81bfee6a810aa51fa6778
Cr-Commit-Position: refs/heads/master@{#26244}

[Michael Achenbach, 2015-01-23 10:04:06]

machenbach@chromium.org changed reviewers:
+ jkummerow@chromium.org, jochen@chromium.org, tandrii@chromium.org

[Michael Achenbach, 2015-01-23 10:04:14]

PTAL

[jochen (gone - plz use gerrit), 2015-01-23 10:06:41]

lgtm

[Michael Achenbach, 2015-01-23 10:16:02]

The CQ bit was checked by machenbach@chromium.org

[commit-bot: I haz the power, 2015-01-23 10:16:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/866263005/1

[commit-bot: I haz the power, 2015-01-23 10:45:31]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-23 10:45:47]

Patchset 1 (id:??) landed as
https://crrev.com/5577dbdcf13c2f6091c81bfee6a810aa51fa6778
Cr-Commit-Position: refs/heads/master@{#26244}